Rodrigo Costas Comesana
Senior researcher
- Name
- Dr. R. Costas Comesana
- Telephone
- +31 71 527 8480
- rcostas@cwts.leidenuniv.nl
- ORCID iD
- 0000-0002-7465-6462
Senior researcher. Rodrigo's research focuses on the development of new social media metrics (altmetrics), new scientometric applications at the individual-level and the study of funding acknowledgements.
Rodrigo Costas is a senior researcher at the Centre for Science and Technology Studies (CWTS) at Leiden University (the Netherlands). Rodrigo is also an Extraordinary Associate Professor at the Centre for Research on Evaluation, Science and Technology (CREST) of Stellenbosch University (South Africa). He holds a PhD in Library and Information Science from the CSIC in Spain.
His areas of expertise include the fields of information science, scientometrics, and social media metrics. At CWTS he leads the research line in ‘altmetrics’, focused on developing new theoretical and analytical approaches to study the interactions between social media and science. Some of his other topics of research include the development of advanced scientometric studies of individual scholars and the study of funding acknowledgments as a new source of scientometric data. In addition to his research activities, Rodrigo is also involved in various European and contract research projects.
Senior researcher
- Faculteit der Sociale Wetenschappen
- CWTS
- Wencan T., Fang Z.., Xianwen W. & Costas Comesana R. (2024), A multi-dimensional analysis of usage counts, Mendeley readership, and citations for journal and conference papers, Scientometrics 129: 985–1013.
- Mongeon P., Bowman T.D. & Costas Comesana R. (2023), An open data set of scholars on Twitter, Quantitative Science Studies 4(2): 314-324.
- Vélez-Cuartas G., Barata G., Costas Comenasa R., Mugnaini R. & Rafols I. (2023), Latmétricas: Special issue on developments of S&T indicators in Latin America, Quantitative Science Studies 4(1): 229-232.
- Servedio V.D.P., Ferreira M.R., Reisz N., Costas Comesana R. & Thurner S. (2023), Scale-free growth in regional scientific capacity building explains long-term scientific dominance, Chaos, Solitons and Fractals 167: 113020.
- Orduña-Malea E. & Costas R. (2023), 1. A scientometric-inspired framework to analyze EurekAlert! press releases. In: , The science-media interface. Knowledge and Information no. 11: De Gruyter Saur.
- Wenceslao A.M. & Costas R. (2023), Do popular research topics attract the most social attention? : A first proposal based on OpenAlex and Wikipedia. 27th International Conference on Science, Technology and Innovation Indicators (STI 2023) 27 September 2023 - 29 September 2023.
- Hare M., MacKnight K., Chikezie M., Krause G., Bowman T., Costas R. & Mongeon P. (2023), Do you cite what you tweet?: Contextualizing the tweet-citation relationship. 27th International Conference on Science, Technology and Innovation Indicators (STI 2023) 27 September 2023 - 29 September 2023.
- Chinchilla-Rodriguez Z., Costas Comesana R., Robinson-Garcia N. & Larivière V. (2023), Examining the quality of the corresponding authorship field in Web of Science and Scopus. [other].
- Arroyo‐Machado W., Díaz‐Faes A. A., Herrera‐Viedma E. & Costas Comesana R. (2023), From academic to media capital: to what extent does the scientific reputation of universities translate into Wikipedia attention?, Journal of the Association for Information Science and Technology 75(4): 423-437.
- Ferreira M., Costas R., Servedio V. & Thurner S. (2023), Scientific mobility, prestige and skill alignment in academic institutions. Computer Science > Digital Libraries. [other].
- Murray D., Yoon J., Kojaku S., Costas Comesana R., Jung W., Milojević S. & Ahn Y. (2023), Unsupervised embedding of trajectories captures the latent structure of scientific migration, Proceedings of the National Academy of Sciences 120(52): e2305414120.
- Hayatdavoudi J., Kaltenbrunner W. & Costas R. (2023), Science and research landscapes across D-8 organization member countries from a historical perspective: the policy context and collective agendas, Quantitative Science Studies 4(2): 466-488.
- Abramo G., Aguillo I.F., Aksnes D.W., Boyack K., BurrellQL., Campanario J.M., Chinchilla-Rodríguez Z., Costas Comesana R., D’Angelo C.A., Harzing A., Jamali H.R., Larivière V., Leydesdorff L., Luwel M., Martin B., Mayr P., McCain K.W., Peters I., Rafols I., Robinson-Garcia N., Schubert T., Small H., Sugimoto C.R., Thelwall M., Besselaar P. van den, Leeuwen T.N/ van & Waltman L.R. (2022), Retraction of predatory publishing in Scopus: =evidence on cross-country differences lacks justification, Scientometrics 128(2): 1459-1461.
- Lyu X. & Costas Comesana R. (2022), Studying the cognitive relatedness between topics in the global science landscape: the case of big fata research, Journal of Information Science : .
- Arroyo-Machado W., Torres-Salinas D. & Costas Comesana R. (2022), Wikinformetrics: construction and description of an open Wikipedia knowledge graph data set for informetric purposes, Quantitative Science Studies 3(4): 931-952.
- Fang Z., Dudek J. & Costas R. (2022), Facing the volatility of tweets in altmetric research, Journal of the Association for Information Science and Technology 73(8): 1192-1195.
- Carballo-Costa L., Michaleff Z.A., Costas Comesana R., Quintela-Del-Rio A., Vivas-Costa J. & Moseley A.M. (2022), Evolution of the thematic structure and main producers of physical therapy interventions research: a bibliometric analysis (1986 to 2017), Brazilian Journal of Physical Therapy 26(4): .
- Carballo-Costa L., Quintela-Del-Rio A., Vivas-Costa J. & Costas Comesana R. (2022), Mapping the field of physical therapy and identification of the leading active producers : a bibliometric analysis of the period 2000-2018, Physiotherapy Theory and Practice : .
- Abramo G., Aguillo I.F., Aksnes D.W., Boyack K., Burrell Q.L., Campanario J.M., Chinchilla-Rodriguez Z., Costas Comesana R., D'Angelo C.A., Harzing A.W., Jamali H.R., LariviFre V., Leydesdorff L., Luwel M., Martin B., Mayr P., McCain K.W., Peters I., Rafols I., Robinson-Garcia N., Schubert T., Small H., Sugimoto C.R., Thelwall M., Besselaar P. van den, Leeuwen T. van & Waltman L. (2022), Predatory publishing in Scopus: evidence on cross-country differences lacks justification , Scientometrics : .
- Machacek V., Srholec M., Ferreira M.R., Robinson-Garcia N. & Costas Comesana R. (2022), Researchers' institutional mobility : bibliometric evidence on academic inbreeding and internationalization, Science and Public Policy 49(1): 85-97.
- Lyu X.Z. & Costas R. (2022), Studying the cognitive relatedness between topics in the global science landscape: the case of Big Data research, Journal of Information Science 0(0): .
- Fang Z., Costas Comesana R. & Wouters P.F. (2022), User engagement with scholarly tweets of scientific papers: a large-scale and cross-disciplinary analysis, Scientometrics 127(8): 4523-4546.
- Cong T., Fang Z.C. & Costas R. (2022), WeChat uptake of chinese scholarly journals: an analysis of CSSCI-indexed journals, Scientometrics 127(12): 7091-7110.
- Ferreira M.R., Bascur Cifuentes J.P. & Costas Comesana R. (2021), Scholars mobility and its impact on the knowledge producers' workforce of European regions. .
- Sixto-Costoya A., Robinson-Garcia N., Leeuwen T.N. van & Costas Comesana R. (2021), Exploring the relevance of ORCID as a source of study of data sharing activities at the individual-level: a methodological discussion, Scientometrics 126(8): 7149-7165.
- Fang Z., Costas Comesana R., Tian W., Wang X. & Wouters P. (2021), How is science clicked on Twitter? : Click metrics for Bitly short links to scientific publications, Journal of the Association for Information Science and Technology 72(7): 918-932.
- Lyu X. & Costas Comesana R. (2021), Studying the characteristics of scientific communities using individual-level bibliometrics: the case of big data research, Scientometrics 126(8): 6965-6987.
- Colavizza G., Costas Comesana R., Traag V.A., Eck N.J.P. van, Leeuwen T.N. van & Waltman L.R. (2021), A scientometric overview of CORD-19, PLoS ONE 16(1): e0244839.
- Costas Comesana R., Rijcke S. de & Marres N.S. (2021), “Heterogeneous couplings”: operationalizing network perspectives to study science‐society interactions through social media metrics, Journal of the Association for Information Science and Technology 72(5): 595-610.
- Orduna-Malea E. & Costas Comesana R. (2021), Link-based approach to study scientific software usage: the case of VOSviewer, Scientometrics 126(9): 8153-8186.
- El Ouahi J., Robinson Garcia N. & Costas Comesana R. (2021), Analyzing scientific mobility and collaboration in the Middle East and North Africa, Quantitative Science Studies 2(3): 1023-1047.
- Lyu Xiaozan Costas Rodrigo (2020), How do academic topics shift across altmetric sources? A case study of the research area of Big Data, Scientometrics 123(2): 909-943.
- Fang Z.C., Costas R., Tian W.C., Wang X.W. & Wouters P. (2020), An extensive analysis of the presence of altmetric data for Web of Science publications across subject fields and research topics, Scientometrics 124(3): 2519-2549.
- Fang Z.C. & Costas Comesana R. (2020), Studying the accumulation velocity of altmetric data tracked by Altmetric.com, Scientometrics 123: 1077-1101.
- Robinson-Garcia N., Costas R., Sugimoto C.R., Larivière V. & Nane G.F. (2020), Task specialization across research careers, eLife 9: .
- González-Valiente C.L., Costas Comesana R., Noyons E., Steinerová J. & Susol J. (2020), Terminological (di) similarities between information management and knowledge management: a term co-occurrence analysis, Mobile Networks and Applications 26: 336-346.
- Schalkwyk F. van, Dudek J. & Costas R. (2020), Communities of shared interests and cognitive bridges: the case of the anti-vaccination movement on Twitter, Scientometrics 125: 1499–1516 .
- Costas R., Mongeon P., Ferreira M.R., Honk J. van & Franssen T. (2020), Large-scale identification and characterization of scholars on Twitter, Quantitative Science Studies 1(2): 771–791.
- Robinson-Garcia N., Costas R. & Leeuwen T.N. van (2020), Open Access uptake by universities worldwide, PeerJ 8: e9410 (e9410).
- Zahedi Z. & Costas Comesana R. (2020), Do online readerships offer useful assessment tools?: Discussion around the practical applications of Mendeley readership for scholarly assessment, Scholarly Assessment Reports 2(1): .
- Schalkwyk F. van, Dudek J. & Costas Comesana R. (2020), Communities of shared interests and cognitive bridges: the case of the anti-vaccination movement on Twitter, Scientometrics 125(2): 1499-1516.
- Costas R., Zahedi Z. & Alperin J.P. (2019), Global country-level patterns of Mendeley readership performance compared to citation performance: does Mendeley provide a different picture on the impact of scientific publications across countries?. Catalano G., Daraio C., Gregori M., Moed H.F. & Ruocco G. (Eds.), Proceedings of the International Conference on Scientometrics and Informetrics. 17th International Conference of the International-Society-for-Scientometrics-and-Informetrics (ISSI) on Scientometrics and Informetrics 2 September 2019 - 5 September 2019. Belgium: Int. Soc. Scientometics & Informetrics ISSI, Katholieke Universiteit Leuven. 1195-1200.
- Robinson-Garcia N., Sugimoto C.R., Murray D., Yegros-Yegros A., Larivière V. & Costas R. (2019), The many faces of mobility: Using bibliometric data to measure the movement of scientists, Journal of Informetrics 13: 50-63.
- Joubert M. & Costas R. (2019), Getting to know science tweeters: a pilot analysis of South African twitter users tweeting about research articles, Journal of Altmetrics 2(1): 2.
- González-Valiente C.L., Santos M.L., Arencibia-Jorge R., Noyons E. & Costas R. (2019), Mapping the evolution of intellectual structure in information management using author co-citation analysis, Mobile Networks and Applications : .
- Díaz-Faes A.A., Bowman T.D. & Costas Comesana R. (2019), Towards a second generation of ‘social media metrics’: characterizing Twitter communities of attention around science, PLoS ONE 14(5): e0216408.
- Wouters P.F., Zahedi Z. & Costas Comesana R. (2019), Social media metrics for new research evaluation. In: Glanzel W., Moed H.F., Schmoch U. & Thelwall M. (Eds.), Springer Handbook of Science and Technology Indicators. Springer Handbooks: Springer.
- Zahedi Z. & Costas R. (2018), General discussion of data quality challenges in social media metrics: Extensive comparison of four major altmetric data aggregators, PLoS ONE 13(5): e0197326.
- Zahedi Z. & Costas Comesana R. (2018), Challenges in the quality of social media data across altmetric data aggregators. Costas Comesana R., Franssen T. & Yegros-Yegros A. (Eds.), Proceedings of the 23rd international conference on science and technology indicators. 23rd International Conference on Science and Technology Indicators 12 September 2018 - 14 September 2018. Leiden: Centre for Science and Technology Studies (CWTS). 1553-1557.
- Desrochers N., Paul-Hus A., Haustein S., Costas R., Mongeon P., Quan-Haase A., Bowman T.D., Pecoskie J., Tsou A. & Lariviere V. (2018), Authorship, citations, acknowledgments and visibility in social media: Symbolic capital in the multifaceted reward system of science, Social Science Information 57(2): 223-248.
- Martín-Martín A., Costas Comesana R., Leeuwen T.N. van & López-Cózar E.D. (2018), Evidence of open access of scientific publications in Google Scholar: a large-scale analysis, Journal of Informetrics 12(3): 819-841.
- Ruiz-Castillo J. & Costas R. (2018), Individual and field citation distributions in 29 broad scientific fields, Journal of Informetrics 12(3): 868-892.
- Robinson-Garcia N., Sugimoto C.R., Murray D., Yegros A., Lariviere V. & Costas Comesana R. (2018), Scientific mobility indicators in practice: international mobility profiles at the country level, Profesional de la Informacion 27(3): 511-520.
- Chinchilla-Rodriguez Z., Bu Y., Robinson-Garcia N., Costas Comesana R. & Sugimoto C.R. (2018), Travel bans and scientific mobility: utility of asymmetry and affinity indexes to inform science policy, Scientometrics 116(1): 569-590.
- Costas Comesana R. & Franssen T.P. (2018), Reflections around 'the cautionary use' of the h-index: response to Teixeira da Silva and Dobránszki, Scientometrics 115(2): 1125-1130.
- Fanelli D., Costas R., Fang F.C., Casadevall A. & Bik E.M. (2018), Testing Hypotheses on Risk Factors for Scientific Misconduct via Matched-Control Analysis of Papers Containing Problematic Image Duplications, Science and Engineering Ethics 25(3): 771-789.
- Wouters P., Reyes Elizondo A.E., Costas R., Franssen T. & Yegros A. (2018), Conference report: STI 2018 Leiden Science, Technology and Innovation Indicators in Transition: ISSI e-Newsletter (ISSI Society), 14(3): 51-54.
- Martín-Martín A., Costas R., Van Leeuwen T.N. & Delgado López Cózar E. (2018), Unbundling Open Access dimensions: a conceptual discussion to reduce terminology inconsistencies, Proceedings of the 23rd International Conference on Science and Technology Indicators. STI Conference 12 September 2018 - 14 September 2018.
- Van Leeuwen T.N., Meijer I., Yegros-Yegros A. & Costas R. (2018), Developing indicators on Open Access by combining evidence from diverse data sources. 2nd International Conference in Science & Technology Indicators (STI), 6-8 September, 2017, Paris, France 6 September 2017 - 8 September 2017. Paris, France: Proceedings of the 2017 STI Conference.
- Zahedi Z., Costas R. & Wouters P.F. (2017), Mendeley readership as a filtering tool to identify highly cited publications, Journal of the Association for Information Science and Technology 68(10): 2511-2521.
- Zahedi Z. & Costas R. (2017), How visible are the research of different countries: an analysis of global vs. local reach of WoS publications on Twitter. 16th International Conference on Scientometrics & Informetrics (ISSI2017) 16 October 2017 - 20 October 2017.
- Costas Comesana R., Van Honk J., Calero-Medina C. & Zahedi Z. (2017), Discussing practical applications for altmetrics: development of ‘social media profiles’ for African, European and North American publications. 2nd International Conference in Science & Technology Indicators (STI), 6-8 September, 2017, Paris, France 6 September 2017 - 8 September 2017.
- Paul-Hus A., Diaz-Faes A.A., Sainte-Marie M., Desrochers N., Costas Comesana R. & Larivière V. (2017), Beyond funding: Acknowledgement patterns in biomedical, natural and social sciences, PLoS ONE 12(10): e0185578.
- Robinson-Garcia N., Mongeon P., Jeng W. & Costas Comesana R. (2017), DataCite as a novel bibliometric source: Coverage, strengths and limitations, Journal of Informetrics 11(3): 841-854.
- Schneider J.W. & Costas Comesana R. (2017), Identifying potential "breakthrough" publications using refined citation analyses: three related explorative approaches, Journal of the Association for Information Science and Technology 68(3): 709-723.
- Mongeon P., Robinson-Garcia N., Jeng W. & Costas R. (2017), Incorporating data sharing to the reward system of science Linking DataCite records to authors in the Web of Science, Aslib Journal of Information Management 69(5): 545-556.
- Fanelli D., Costas Comesana R. & Ioannidis J.P.A. (2017), Meta-assessment of bias in science, Proceedings of the National Academy of Sciences 114(14): 3714-3719.
- Nane G.F., Larivière V. & Costas Comesana R. (2017), Predicting the age of researchers using bibliometric data, Journal of Informetrics 11(3): 713-729.
- Sugimoto C.R., Robinson-Garcia N., Murray D.S., Yegros-Yegros A., Costas R. & Lariviere V. (2017), Scientists have most impact when they're free to move, Nature 550(7674): 29-31.
- Robinson-Garcia N., Costas Comesana R., Isett K., Melkers J. & Hicks D. (2017), The unbearable emptiness of tweeting - about journal articles, PLoS ONE 12(8): e0183551.
- Costas R., Perianes-Rodriguez A. & Ruiz-Castillo J. (2017), On the quest for currencies of science: Field "exchange rates" for citations and Mendeley readership, Aslib Journal of Information Management 69(5): 557-575.
- Costas R. (2017), Towards the social media studies of science: social media metrics, present and future, Bibliotecas: Anales de Investigación 13(1): 5-9.
- Paul-Hus A., Desrochers N. & Costas R. (2016), Characterization, description, and considerations for the use of funding acknowledgement data in Web of Science, Scientometrics 108(1): 167-182.
- Prins A.A.M., Costas R., Van Leeuwen T.N. & Wouters P.F. (2016), Using Google Scholar in research evaluation of humanities and social science programs: A comparison with Web of Science data, Research Evaluation 25(3): 264-270.
- Haustein S., Bowman T. & Costas Comesana R. (2016), Interpreting “altmetrics": viewing acts on social media through the lens of citation and social theories. In: Sugimoto C.R. (Ed.), Theories of informetrics and scholarly communication: a Festschrift in honor of Blaise Cronin. Berlin: De Gruyter. 372-405.
- Lariviere V. & Costas Comesana R. (2016), How many is too many?: On the relationship between research productivity and impact, PLoS ONE 11(9): e0162709.
- Zahedi Z., Costas R., Larivière V. & Haustein S. (2016), What makes papers visible on social media?: An analysis of various document characteristics. Ràfols I., Molas-Gallart J., Castro-Martínez E. & Woolley R. (Eds.), Proceedings of the 21th International Conference on Science and Technology Indicators. 21st International Conference in Science & Technology Indicators (STI) 13 September 2016 - 16 September 2016. Valencia, Spain: Universitat Politècnica de Valencia. 1196-1199.
- Zahedi Z., Haustein S., Larivière V. & Costas Comesana R. (2016), On the relationships between bibliometric and altmetric indicators: The effect of discipline and density level. The 2016 Altmetrics Workshop, 27 September, 2016, Bucharest, Romania. 27 September 2016 - 27 September 2016.
- Fraumann G., Costas Comesana R., Mugnaini R., Packer A.L. & Zahedi Z. (2016), Twitter presence and altmetrics counts of SciELO Brazil Journals. The 2016 Altmetrics Workshop Bucharest, Romania, 27 September 2016 27 September 2016 - 27 September 2016.
- Costas Comesana R., Haustein S., Zahedi Z. & Larivière V. (2016), Exploring paths for the normalization of altmetrics: applying the characteristic scores and scales. The 2016 Altmetrics Workshop, Bucharest, Romania, 27 September 2016 27 September 2016 - 27 September 2016.
- Costas R., Zahedi Z. & Wouters P.F. (2015), Do altmetrics correlate with citations? Extensive comparison of altmetric indicators with citations from a multidisciplinary perspective, Journal of the Association for Information Science and Technology 66(10): 2003-2019.
- Zahedi Z., Costas R. & Wouters P. (2015), Do mendeley readership counts help to filter highly cited WoS publications better than average citation impact of journals (JCS)?, Proceedings of the 15th International Conference of the International Society for Scientometrics and Informetrics. 15th International Conference on Scientometrics and Informetrics (ISSI), 29 Jun-4 July, 2015, Bogazici University, Istanbul (Turkey) 29 June 2015 - 4 July 2015 16-25.
- Morillo F., Costas R. & Bordons M. (2015), How is credit given to networking centres in their publications? A case study of the Spanish CIBER research structures, Scientometrics 103(3): 923-938.
- Lariviere V. & Costas Comesana R. (2015), How many is too many? : On the relationship between output and impact in research. Salah A.A., Tonta Y., Akdag Salah A.A., Sugimoto C. & Al U. (Eds.), Proceedings of the 15th International Society of Scientometrics and Infometrics conference. 15th International Society of Scientometrics and Infometrics Conference 29 June 2015 - 4 July 2015. Proceedings of ISSI 2015 Istanbul: 15th International Society of Scientometrics and Informetrics Conference. Istanbul: Bogaziçi University Printhouse. 590-595.
- Fanelli D., Costas R. & Lariviere V. (2015), Misconduct policies, academic culture and career stage, not gender or pressures to publish, affect scientific integrity, PLoS ONE 10(6): e0127556.
- Diaz-Faes A.A., Costas R., Purificacion G.M. & Bordons M. (2015), Unravelling the performance of individual scholars: Use of Canonical Biplot analysis to explore the performance of scientists by academic rank and scientific field, Journal of Informetrics 9(4): 722-733.
- Costas R., Nane T. & Lariviere V. (2015), Is the Year of First Publication a Good Proxy of Scholars' Academic Age? 15th International Society of Scientometrics and Infometrics Conference, Istanbul, Proceedings of the 15th International Society of Scientometrics and Infometrics Conference, Istanbul, Turkey. 15th International Society of Scientometrics and Infometrics Conference 29 June 2015 - 4 July 2015. Proceedings of ISSI 2015 Istanbul: 15th International Society of Scientometrics and Informetrics Conference 988-998.
- Haustein S., Bowman T.D. & Costas R. (2015), When is an article sctually published? : an analysis of online availability, publication, and idexation dates. 15th International Society of Scientometrics and Infometrics Conference, Proceedings of the 15th International Society of Scientometrics and Infometrics Conference. 15th International Society of Scientometrics and Infometrics Conference 29 June 2015 - 4 July 2015. Proceedings of ISSI 2015 Istanbul: 15th International Society of Scientometrics and Informetrics Conference 1170-1179.
- Robinson-Garcia N., Noijons E. & Costas R. (2015), Can We Track the Geography of Surnames Based on Bibliographic Data? , Proceedings of ISSI 2015 Istanbul: 15th International Society of Scientometrics and Infometrics Conference. 15th International Society of Scientometrics and Infometrics Conference 29 June 2015 - 4 July 2015 1208-1217.
- Costas R., Zahedi Z. & Wouters P. (2015), The thematic orientation of publications mentioned on social media: Large-scale disciplinary comparison of social media metrics with citations, Aslib Journal of Information Management 67(3): 260-288.
- Haustein S., Costas Comesana R. & Larivière V. (2015), Characterizing social media metrics of scholarly papers: the effect of document properties and collaboration patterns, PLoS ONE 10(3): e0120495.
- Zahedi Z., Fenner M. & Costas R. (2015), Consistency among altmetrics data provider/aggregators: What are the challenges? Altmetrics workshop, 9 October 2015, Amsterdam Science Park, Amsterdam. Altmetrics Workshop, 9 October 2015, Amsterdam Science Park, Amsterdam, The Netherlands. 9 October 2015 - 9 October 2015.
- Fraumann G., Zahedi Z. & Costas Comesana R. (2015), What do we know about Altmetric.com sources? : A study of the top 200 blogs and news sites mentioning scholarly output. Altmetrics Workshop, 9 October 2015, Amsterdam Science Park, Amsterdam, The Netherlands. 9 October 2015 - 9 October 2015.
- Zahedi Z., Fenner M. & Costas R. (2015), Challenges in altmetric data collection: are there differences among different altmetric providers/aggregators? . 2 AM Conference 8 October 2015 - 10 October 2015.
- Zahedi Z., Fenner M. & Costas R. (2014), How consistent are altmetrics providers? Study of 1000 PLOS ONE publications using the PLOS ALM, Mendeley and Altmetric.com APIs, altmetrics14: expanding impacts and metrics - An ACM Web Science Conference 2014 Altmetrics Workshop. altmetrics14: expanding impacts and metrics An ACM Web Science Conference 2014 Altmetrics Workshop, 23-26 June, Indiana University, Indiana, USA 23 June 2014 - 26 June 2014.
- Zahedi Z., Costas R. & Wouters P. (2014), Assessing the impact of the publications read by the different Mendeley users: Is there any different pattern among users?, Proceedings of the IATUL Conferences. 35th International Association of Technological University Libraries (IATUL), 2-5 June 2014, Helsinki, Finland 2 June 2014 - 5 June 2014. West Lafayette, USA: Purdue University.
- Costas R., Zahedi Z. & Wouters P. (2014), Disentangling the meaning of ‘altmetrics’: Content analysis of Web of Science scientific publications, altmetrics14: expanding impacts and metrics An ACM Web Science Conference 2014 Altmetrics Workshop. altmetrics14: expanding impacts and metrics An ACM Web Science Conference 2014 Altmetrics Workshop, 23-26 June, Indiana University, Indiana, USA 23 June 2014 - 26 June 2014.
- Zahedi Z., Costas R. & Wouters P. (2014), Broad altmetric analysis of Mendeley readerships through the academic status of the readers of scientific publication, Proceedings of the 19th International Conference on Science and Technology Indicators. 19th Science and Technology Indicators Conference, 3-5 September, Leiden, The Netherlands 3 September 2014 - 5 September 2014 720-727.
- Costas R., Zahedi Z. & Wouters P.F. (2014), Do ‘altmetrics’ correlate with citations?: Extensive comparison of altmetric indicators with citations from a multidisciplinary perspective no. CWTS-WP-2014-001. Leiden: Centre for Science and Technology Studies.
- Ruiz-Castillo J. & Costas R. (2014), The skewness of scientific productivity, Journal of Informetrics 8(4): 917-934.
- Costas R., Leeuwen T.N. van & Raan A.F.J. van (2014), Erratum to "Effects of the durability of scientific literature at the group level: Case study of chemistry research groups in the Netherlands" [Res. Policy 42 (4) (2013) 886-894], Research Policy 43(8): 1468-1468.
- Robinson-García N., Torres-Salinas D., Zahedi Z. & Costas Comesana R. (2014), New data, new possibilities: exploring the insides of altmetric.com, Profesional de la Informacion 23(4): 359-366.
- Waltman L.R. & Costas Comesana R. (2014), F1000 Recommendations as a potential new data source for research evaluation: a comparison with citations, Journal of the Association for Information Science and Technology 65(3): 433-445.
- Reijnhoudt L., Costas Comesada R., Noyons E., Borner K. & Scharnhorst A. (2014), 'Seed plus expand': a general methodology for detecting publication oeuvres of individual researchers, Scientometrics 101(2): 1403-1417.
- Robinson-Garcia N., Torres-Salinas D., Zahedi Z. & Costas R. (2014), Nuevos datos, nuevas posibilidades: Revelando el interior de Altmetric.com (New data, new possibilities: Exploring the insides of Altmetric.com), Profesional de la Informacion 23(4): 359-366.
- Zahedi Z., Costas R. & Wouters P. (2014), How well developed are altmetrics? A cross-disciplinary analysis of the presence of 'alternative metrics' in scientific publications, Scientometrics 101(2): 1491-1513.
- Zahedi Z., Costas R. & Wouters P.F. (2013), What is the impact of the publications read by the different Mendeley users? Could they help to identify alternative types of impact? PLoS ALM Workshop, San Francisco. . San Francisco, US.: PLoS ALM Workshop.
- Costas Comesana R. & Yegros A. (2013), Possibilities of funding acknowledgement analysis for the bibliometric study of research funding organizations: case study of the Austrian Science Fund (FWF). Gorraiz J., Schiebel E, Gumpenberger C., Hörlesberger M. & Moed H. (Eds.), Proceedings of the 14th International Conference of the International Society for Scientometrics and Informetrics. 14th International Society of Scientometrics and Informetrics Conference 15 July 2013 - 19 July 2013 no. 2013 1401-1408.
- Costas R., Calero-Medina C., Waltman L. & Wouters P. (2013), The relationship between the performance of editorial board members and the impact of scientific journals : an exploratory analysis, Proceedings of 18Th International Conference on Science and Technology Indicators. 18Th International Conference on Science and Technology Indicators 4 September 2013 - 6 September 2013 87-95.
- Zahedi Z., Costas R. & Wouters P.F. (2013), How well developed are Altmetrics? Cross-disciplinary analysis of the presence of 'alternative metrics' in scientific publications. Gorraiz J., Schiebel E., Gumpenberger C., Hörlesberger M. & Moed H. (Eds.), Proceedings of ISSI 2013 Vienna. 14th International Society of Scientometrics and Informetrics Conference 15 July 2013 - 19 July 2013. Vienna, Austria: 14th International Society of Scientometrics and Informetrics Conference (ISSI ), 16-19 July 2013, University of Vienna, Austria.
- Reijnhoudt L., Costas R., Noijons E., Borner K. & Scharnhorst A. (2013), 'Seed plus expland: a validated methodology for creating high quality publication oeuvres of individual researchers, Proceedings of the 14th International Conference of the International Society for Scientometrics and Informetrics. 14TH International Society of Scientometrics and Informetrics Conference 15 July 2013 - 19 July 2013. 14th International Society of Scientometrics and Informetrics Conference (ISSI) 1587-1600.
- Costas Comesana R. & Noyons E.C.M. (2013), Detection of different types of ‘talented’ researchers in the Life Sciences through bibliometric indicators: methodological outline no. CWTS-WP-2013-006. Leiden: Centre for Science and Technology Studies.
- Costas R., Meijer I., Zahedi Z. & Wouters P.F. (2013), The value of research data metrics for datasets from a cultural and technical point of view: a knowledge exchange report. Denmark: Knowledge Exchange.
- Yegros-Yegros A. & Costas R. (2013), Analysis of the Web of Science Funding Acknowledgement Information for the Design of Indicators on 'External Funding Attraction', Proceedings of the 14th International Conference of the International Society for Scientometrics and Informetrics. 14th International Society of Scientometrics and Informetrics Conference 15 July 2013 - 19 July 2013. 14th International Society of Scientometrics and Informetrics Conference (ISSI) 84-95.
- Costas Comesana R., Leeuwen T.N. van & Raan A.F.J.van (2013), Effects of the durability of scientific literature at the group level: case study of chemistry research groups in the Netherlands, Research Policy 42(4): 886-894.
- Leeuwen T. van, Costas Comesana R., Calero-Medina C. & Visser M. (2013), The role of editorial material in bibliometric research performance assessments, Scientometrics 95(2): 817-828.
- Bordons M., Aparicio J. & Costas R. (2013), Heterogeneity of collaboration and its relationship with research impact in a biomedical field, Scientometrics 96(2): 443-466.
- Bordons M., Aparicio J. & Costas R. (2012), Trends in the Collaborative Structure of the Spanish Pharmacological Scientific Production and its Influence over Research Impact, Proceedings of the 17th International Conference on Science and Technology Indicators, Montreal, Canada, September 5-8, 2012. Proceedings of the 17th International Conference on Science and Technology Indicators 142-154.
- Costas R. & Van Leeuwen T.N. (2012), New indicators based on the 'Funding Acknowledgment' information in the Web of Science: analysis of the effect of peer review over the impact of scientific journals, Proceedings of the 17th International Conference on Science and Technology Indicators, Montreal, Canada. 17th International Conference on Science and Technology Indicators, Montreal, Canada 193-205.
- Costas R. (2012), Influence of collaboration on the impact of publication at different levels of aggregation: analysis of Spanish research on Marine Sciences, PontodeAcesso 5(3): 149-173.
- Costas Comesana R. & Bochove C.A. van (2012), On the relationship between author collaboration and impact of scientific publications. Gingras Y., Archambault E. & Larivière V. (Eds.), Proceedings of the 17th international conference on science and technology indicators, Montreal, Canada, September 5-8, 2012. 17th International Conference on Science and Technology Indicators, Montreal, Canada, September 5-8, 2012: Science-Metrix. 447-448.
- Waltman L.R., Costas Comesana R. & Eck N.J.P. van (2012), Some limitations of the h Index: a commentary on Ruscio and colleagues' analysis of bibliometric indices, Measurement: Interdisciplinary Research and Perspectives 10(3): 172-175.
- Costas Comesana R., Leeuwen T.N. van & Bordons M. (2012), Referencing patterns of individual researchers: do top scientists rely on more extensive information sources?, Journal of the American Society for Information Science and Technology 63(12): 2433-2450.
- Costas Comesana R. & Leeuwen T.N. van (2012), Approaching the "reward triangle": general analysis of the presence of funding acknowledgments and "peer interactive communication" in scientific publications, Journal of the American Society for Information Science and Technology 63(8): 1647-1661.
- Costas Comesana R., Van Leeuwen T.N. & Bordons M. (2011), Referencing patterns among individual researchers: study of the use of scientific literature from a micro-level perspective. Noyons E., Ngulube P. & Leta J. (Eds.), Proceedings of the 13th International Conference of the International Society for Scientometrics and Informetrics. Proceedings of the 13th Conference of the International Society for Scientometrics and Informetrics, Durban, South Africa, July 4-7, 2011. PROCEEDINGS OF ISSI 2011: THE 13TH CONFERENCE OF THE INTERNATIONAL SOCIETY FOR SCIENTOMETRICS AND INFORMETRICS, VOLS 1 AND 2 no. 2011 163-174.
- Costas R., Leeuwen T.N. van & Raan A.F.J. van (2011), The "Mendel syndrome" in science: durability of scientific literature and its effects on bibliometric analysis of individual scientists, Scientometrics 89(1): 177-205.
- Costas R. & Bordons M. (2011), Do age and professional rank influence the order of authorship in scientific publications?: Some evidence from a micro-level perspective, Scientometrics 88(1): 145-161.
- Thijs B., Costas R. & Glänzel W. (20 September 2011), Multi-authorship and citation advantage, a mythical relationship. 12th COLLNET Meeting. September 20-23. Istanbul. [lecture].
- Costas Comesana R., Leeuwen T.N. van & Raan A.F.J. van (2010), Is scientific literature subject to a 'sell-by-date'? : A general methodology to analyze the 'durability' of scientific documents, Journal of the American Society for Information Science and Technology 61(2): 329-339.
- Costas Comesana R., Leeuwen T.N. van & Bordons M. (2010), Self-citations at the meso and individual levels: effects of different calculation methods, Scientometrics 82(3): 517-537.
- Costas Comesana R., Leeuwen T.N. van & Bordons M. (2010), A bibliometric classificatory approach for the study and assessment of research performance at the individual level: the effects of age on productivity and impact, Journal of the American Society for Information Science and Technology 61(8): 1564-1581.
- Costas Comesana R., Van Leeuwen T.N. & Bordons M. (2009), A bibliometric methodology for supporting research assessment at individual level: a classification approach, Proceedings of the ISSI Conferences 2009(2): 817-828.
- Costas Comesana R., Leeuwen T.N. van & Raan A.F.J. van (2009), Development of a general methodology for the analysis of the "durability" of scientific documents. Larsen B. & Leta J. (Eds.), Proceedings of the 12th international conference on scientometrics and informetrics. ISSI 2009 no. 2. Rio de Janeiro: BIREME/PAHO/WHO/Federal University of Rio de Janeiro . 918-919.
- Costas Comesana R., Bordons M., Leeuwen T.N. van & Raan A.F.J. van (2009), Scaling rules in the science system: influence of field-specific citation characteristics on the impact of individual researchers, Journal of the American Society for Information Science and Technology 60(4): 740-753.
- Costas Comesana R. & Bordons M. (2008), Is g-index better than h-index? : An exploratory study at the individual level, Scientometrics 77(2): 267-288.
- Costas Comesana R., Moreno L. & Bordons M. (2008), Overlapping and singularity of MEDLINE, WoS and IME for the analysis of the scientific activity of a region in Health Sciences, Revista Espanola de Documentacion Cientifica 31(3): 327-343.
- Costas R. & Bordons M. (2008), Development of a thematic filter for the bibliometric delimitation on interdisciplinary area: the case of Marine Science, Revista Espanola de Documentacion Cientifica 31(2): 261-272.
- Costas Comesana R. & Bordons M. (2007), The h-index: advantages, limitations and its relation with other bibliometric indicators at the micro level, Journal of Informetrics 1(3): 193-203.
- Costas Comesana R. & Iribarren-Maestro I. (2007), Variations in content and format of ISI databases in their different versions: the case of the Science Citation index in CD-ROM and the web of science, Scientometrics 72(2): 167-183.
- Costas Comesana R. & Bordons M. (2007), A classificatory scheme for the analysis of bibliometric profiles at the micro level, Proceedings of the ISSI Conferences 2007(1): 226-230.
- Costas Comesana R. & Bordons M. (2007), Algorithms to solve the lack of normalization in author names in bibliometric studies, Investigación Bibliotecológica 21(42): 13-32.
- Costas Comesana R. & Bordons M. (2007), A critical view of the h-index: observations based on a practical application = Una visión crítica del índice h: algunas consideraciones derivadas de su aplicación práctica, Profesional de la Informacion 16(5): 427-432.
- Costas Comesana R. & Bordons M. (2005), Methodological procedure to overcome the lack of normalisation of author names in bibliometric analyses at the micro level, Proceedings of the ISSI Conferences 2005: 688-689.
- Costas Comesana R. & Bordons M. (2005), Bibliometric indicators at the micro-level: some results in the area of natural resources at the Spanish CSIC, Research Evaluation 14(2): 110-120.