A Novel Algorithm for Visualizing Concept Associations. - Nees Jan van Eck; Ludo Waltman; Jan van den Berg (DEXA Workshops, 2005)

Visualizing the WCCI 2006 Knowledge Domain. - Nees Jan van Eck; Ludo Waltman; Jan van den Berg; Uzay Kaymak (FUZZ-IEEE, 2006)

VOS: A New Method for Visualizing Similarities Between Objects. - Nees Jan van Eck; Ludo Waltman (GfKl, 2006)

Visualizing Concept Associations Using Concept Density Maps. - Nees Jan van Eck; Flavius Frasincar; Jan van den Berg (IV, 2006)

Visualizing the computational intelligence field [Application Notes]. - Nees Jan van Eck; Ludo Waltman; Jan van den Berg; Uzay Kaymak (IEEE Comput. Intell. Mag., 2006)

Prediction of Stock Price Movements Based on Concept Map Information. - Ankit Soni; Nees Jan van Eck; Uzay Kaymak (MCDM, 2007)

Bibliometric Mapping of the Computational Intelligence Field. - Nees Jan van Eck; Ludo Waltman (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2007)

Some comments on the question whether co-occurrence data should be normalized. - Ludo Waltman; Nees Jan van Eck (J. Assoc. Inf. Sci. Technol., 2007)

Cluster-Based Visualization of Concept Associations. - Nees Jan van Eck; Flavius Frasincar; Dwain Chang (IV, 2008)

Application of reinforcement learning to the game of Othello. - Nees Jan van Eck; Michiel C. van Wezel (Comput. Oper. Res., 2008)

Appropriate similarity measures for author co-citation analysis. - Nees Jan van Eck; Ludo Waltman (J. Assoc. Inf. Sci. Technol., 2008)

Generalizing the h- and g-indices. - Nees Jan van Eck; Ludo Waltman (J. Informetrics, 2008)

Some comments on the journal weighted impact factor proposed by Habibzadeh and Yadollahie. - Ludo Waltman; Nees Jan van Eck (J. Informetrics, 2008)

How to normalize cooccurrence data? An analysis of some well-known similarity measures. - Nees Jan van Eck; Ludo Waltman (J. Assoc. Inf. Sci. Technol., 2009)

On the proper understanding of the limiting behavior of generalizations of the h- and g-indices. - Nees Jan van Eck; Ludo Waltman (J. Informetrics, 2009)

Some comments on Egghe's derivation of the impact factor distribution. - Ludo Waltman; Nees Jan van Eck (J. Informetrics, 2009)

A comparison of two techniques for bibliometric mapping: Multidimensional scaling and VOS. - Nees Jan van Eck; Ludo Waltman; Rommert Dekker; Jan van den Berg (J. Assoc. Inf. Sci. Technol., 2010)

The relation between Eigenfactor, audience factor, and influence weight. - Ludo Waltman; Nees Jan van Eck (J. Assoc. Inf. Sci. Technol., 2010)

Rivals for the crown: Reply to Opthof and Leydesdorff. - Anthony F. J. van Raan; Thed N. van Leeuwen; Martijn S. Visser; Nees Jan van Eck; Ludo Waltman (J. Informetrics, 2010)

A unified approach to mapping and clustering of bibliometric networks. - Ludo Waltman; Nees Jan van Eck; Ed C. M. Noyons (J. Informetrics, 2010)

Software survey: VOSviewer, a computer program for bibliometric mapping. - Nees Jan van Eck; Ludo Waltman (Scientometrics, 2010)

Automatic term identification for bibliometric mapping. - Nees Jan van Eck; Ludo Waltman; Ed C. M. Noyons; R. K. Buter (Scientometrics, 2010)

Text mining and visualization using VOSviewer - Nees Jan van Eck; Ludo Waltman (CoRR, 2011)

Towards a new crown indicator: Some theoretical considerations. - Ludo Waltman; Nees Jan van Eck; Thed N. van Leeuwen; Martijn S. Visser; Anthony F. J. van Raan (J. Informetrics, 2011)

Globalisation of science in kilometres. - Ludo Waltman; Robert J. W. Tijssen; Nees Jan van Eck (J. Informetrics, 2011)

On the map: Nature and Science editorials. - Cathelijn J. F. Waaijer; Cornelis A. van Bochove; Nees Jan van Eck (Scientometrics, 2011)

Towards a new crown indicator: an empirical analysis. - Ludo Waltman; Nees Jan van Eck; Thed N. van Leeuwen; Martijn S. Visser; Anthony F. J. van Raan (Scientometrics, 2011)

On the correlation between bibliometric indicators and peer review: reply to Opthof and Leydesdorff. - Ludo Waltman; Nees Jan van Eck; Thed N. van Leeuwen; Martijn S. Visser; Anthony F. J. van Raan (Scientometrics, 2011)

A recursive field-normalized bibliometric performance indicator: an application to the field of library and information science. - Ludo Waltman; Erjia Yan; Nees Jan van Eck (Scientometrics, 2011)

Research collaboration and the expanding science grid: Measuring globalization processes worldwide - Robert J. W. Tijssen; Ludo Waltman; Nees Jan van Eck (CoRR, 2012)

Citation analysis may severely underestimate the impact of clinical research as compared to basic research - Nees Jan van Eck; Ludo Waltman; Anthony F. J. van Raan; Robert J. M. Klautz; Wilco C. Peul (CoRR, 2012)

The Leiden ranking 2011/2012: Data collection, indicators, and interpretation. - Ludo Waltman; Clara Calero-Medina; Joost Kosten; Ed C. M. Noyons; Robert J. W. Tijssen; Nees Jan van Eck; Thed N. van Leeuwen; Anthony F. J. van Raan; Martijn S. Visser; Paul Wouters (J. Assoc. Inf. Sci. Technol., 2012)

The inconsistency of the h-index. - Ludo Waltman; Nees Jan van Eck (J. Assoc. Inf. Sci. Technol., 2012)

A new methodology for constructing a publication-level classification system of science. - Ludo Waltman; Nees Jan van Eck (J. Assoc. Inf. Sci. Technol., 2012)

Universality of citation distributions revisited. - Ludo Waltman; Nees Jan van Eck; Anthony F. J. van Raan (J. Assoc. Inf. Sci. Technol., 2012)

A mathematical analysis of the long-run behavior of genetic algorithms for social modeling. - Ludo Waltman; Nees Jan van Eck (Soft Comput., 2012)

A smart local moving algorithm for large-scale modularity-based community detection. - Ludo Waltman; Nees Jan van Eck (CoRR, 2013)

A systematic empirical comparison of different approaches for normalizing citation impact indicators. - Ludo Waltman; Nees Jan van Eck (J. Informetrics, 2013)

Some modifications to the SNIP journal impact indicator. - Ludo Waltman; Nees Jan van Eck; Thed N. van Leeuwen; Martijn S. Visser (J. Informetrics, 2013)

Counting publications and citations: Is more always better? - Ludo Waltman; Nees Jan van Eck; Paul Wouters (J. Informetrics, 2013)

Source normalized indicators of citation impact: an overview of different approaches and an empirical comparison. - Ludo Waltman; Nees Jan van Eck (Scientometrics, 2013)

Systematic Retrieval of Scientific Literature based on Citation Relations: Introducing the CitNetExplorer Tool. - Nees Jan van Eck; Ludo Waltman (BIR@ECIR, 2014)

CitNetExplorer: A new software tool for analyzing and visualizing citation networks. - Nees Jan van Eck; Ludo Waltman (J. Informetrics, 2014)

Clustering scientific publications based on citation relations: A systematic comparison of different methods. - Lovro Subelj; Nees Jan van Eck; Ludo Waltman (CoRR, 2015)

Field-normalized citation impact indicators and the choice of an appropriate counting method. - Ludo Waltman; Nees Jan van Eck (J. Informetrics, 2015)

Evaluation of the citation matching algorithms of CWTS and iFQ in comparison to the Web of science. - Marlies Olensky; Marion Schmidt; Nees Jan van Eck (J. Assoc. Inf. Sci. Technol., 2016)

Constructing bibliometric networks: A comparison between full and fractional counting. - Antonio Perianes-Rodríguez; Ludo Waltman; Nees Jan van Eck (J. Informetrics, 2016)

The elephant in the room: The problem of quantifying productivity in evaluative scientometrics. - Ludo Waltman; Nees Jan van Eck; Martijn S. Visser; Paul Wouters (J. Informetrics, 2016)

Reference behavior in the full text of scientific articles: A large-scale analysis. - Kevin W. Boyack; Nees Jan van Eck; Giovanni Colavizza; Ludo Waltman (ISSI, 2017)

Exploring the Similarity of Articles Co-cited at Different Levels. - Giovanni Colavizza; Kevin W. Boyack; Nees Jan van Eck; Ludo Waltman (ISSI, 2017)

Accuracy of citation data in Web of Science and Scopus. - Nees Jan van Eck; Ludo Waltman (ISSI, 2017)

Using full-text data to create improved term maps. - Nees Jan van Eck; Ludo Waltman; Min Song 001; Yoo Kyung Jeong (ISSI, 2017)

The Closer the Better: Similarity of Publication Pairs at Different Co-Citation Levels. - Giovanni Colavizza; Kevin W. Boyack; Nees Jan van Eck; Ludo Waltman (CoRR, 2017)

Topic identification challenge. - Kevin W. Boyack; Wolfgang Glänzel; Jochen Gläser; Frank Havemann; Andrea Scharnhorst; Bart Thijs; Nees Jan van Eck; Theresa Velden; Ludo Waltman (Scientometrics, 2017)

Citation-based clustering of publications using CitNetExplorer and VOSviewer. - Nees Jan van Eck; Ludo Waltman (Scientometrics, 2017)

Field normalization of scientometric indicators. - Ludo Waltman; Nees Jan van Eck (CoRR, 2018)

From Louvain to Leiden: guaranteeing well-connected communities. - Vincent A. Traag; Ludo Waltman; Nees Jan van Eck (CoRR, 2018)

From dignity to security protocols: a scientometric analysis of digital ethics. - René Mahieu; Nees Jan van Eck; David van Putten; Jeroen van den Hoven (Ethics Inf. Technol., 2018)

The Closer the Better: Similarity of Publication Pairs at Different Cocitation Levels. - Giovanni Colavizza; Kevin W. Boyack; Nees Jan van Eck; Ludo Waltman (J. Assoc. Inf. Sci. Technol., 2018)

Analyzing the activities of visitors of the Leiden Ranking website. - Nees Jan van Eck; Ludo Waltman (J. Data Inf. Sci., 2018)

Characterizing in-text citations in scientific articles: A large-scale analysis. - Kevin W. Boyack; Nees Jan van Eck; Giovanni Colavizza; Ludo Waltman (J. Informetrics, 2018)

Field Normalization of Scientometric Indicators. - Ludo Waltman; Nees Jan van Eck (Springer Handbook of Science and Technology Indicators, 2019)

An Interactive Visual Tool for Scientific Literature Search: Proposal and Algorithmic Specification. - Juan Pablo Bascur; Nees Jan van Eck; Ludo Waltman (BIR@ECIR, 2019)

Community Detection Using Citation Relations and Textual Similarities in a Large Set of PubMed Publications. - Per Ahlgren; Yunwei Chen; Cristian Colliander; Nees Jan van Eck (ISSI, 2019)

Comparing institutional-level bibliometric indicator values based on different affiliation disambiguation systems. Benchmarking Web of Science and Scopus platform tools against a gold-standard data set for Germany. - Paul Donner; Christine Rimmert; Nees Jan van Eck (ISSI, 2019)

Variations in citation practices across the scientific landscape: Analysis based on a large full-text corpus. - Wout S. Lamers; Nees Jan van Eck; Ludo Waltman (ISSI, 2019)

Measuring disagreement in science. - Dakota S. Murray; Wout Lamers; Kevin W. Boyack; Vincent Larivière; Cassidy R. Sugimoto; Nees Jan van Eck; Ludo Waltman (ISSI, 2019)

Intermediacy of publications. - Lovro Subelj; Ludo Waltman; Vincent A. Traag; Nees Jan van Eck (ISSI, 2019)

Large-scale comparison of bibliographic data sources: Web of Science, Scopus, Dimensions, and Crossref. - Martijn S. Visser; Nees Jan van Eck; Ludo Waltman (ISSI, 2019)

Browsing Citation Clusters for Academic Literature Search: A Simulation Study with Systematic Reviews. - Juan Pablo Bascur; Suzan Verberne; Nees Jan van Eck; Ludo Waltman (BIR@ECIR, 2020)

Enhancing direct citations: A comparison of relatedness measures for community detection in a large set of PubMed publications. - Per Ahlgren; Yunwei Chen; Cristian Colliander; Nees Jan van Eck (Quant. Sci. Stud., 2020)

Comparing institutional-level bibliometric research performance indicator values based on different affiliation disambiguation systems. - Paul Donner; Christine Rimmert; Nees Jan van Eck (Quant. Sci. Stud., 2020)

A principled methodology for comparing relatedness measures for clustering publications. - Ludo Waltman; Kevin W. Boyack; Giovanni Colavizza; Nees Jan van Eck (Quant. Sci. Stud., 2020)

Collecting large-scale publication data at the level of individual researchers: a practical proposal for author name disambiguation. - Ciriaco Andrea D'Angelo; Nees Jan van Eck (Scientometrics, 2020)

Large-scale comparison of bibliographic data sources: Scopus, Web of Science, Dimensions, Crossref, and Microsoft Academic. - Martijn S. Visser; Nees Jan van Eck; Ludo Waltman (Quant. Sci. Stud., 2021)

Funding COVID-19 research: Insights from an exploratory analysis using open data infrastructures. - Alexis-Michel Mugabushaka; Nees Jan van Eck; Ludo Waltman (Quant. Sci. Stud., 2022)

Academic information retrieval using citation clusters: in-depth evaluation based on systematic reviews. - Juan Pablo Bascur; Suzan Verberne; Nees Jan van Eck; Ludo Waltman (Scientometrics, 2023)

Which topics are visualized by science maps? A topic-driven clustering effectiveness analysis. - Juan Pablo Bascur; Suzan Verberne; Nees Jan van Eck; Ludo Waltman (BIR/IR4U2, 2024)

Coverage and metadata availability of African publications in OpenAlex: A comparative analysis. - Patricia Alonso-Álvarez; Nees Jan van Eck (CoRR, 2024)

Which topics are best represented by science maps? An analysis of clustering effectiveness for citation and text similarity networks. - Juan Pablo Bascur; Suzan Verberne; Nees Jan van Eck; Ludo Waltman (Scientometrics, 2025)