Ludo Waltman


2007

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Some comments on the question whether co-occurrence data should be normalized
Ludo Waltman | Nees Jan van Eck
2007 Volume 58 Issue 11

2008

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Appropriate similarity measures for author co-citation analysis
Nees Jan van Eck | Ludo Waltman
2008 Volume 59 Issue 10

2009

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How to normalize cooccurrence data? An analysis of some well-known similarity measures
Nees Jan van Eck | Ludo Waltman
2009 Volume 60 Issue 8

2010

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The relation between Eigenfactor, audience factor, and influence weight
Ludo Waltman | Nees Jan van Eck
2010 Volume 61 Issue 7

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A comparison of two techniques for bibliometric mapping: Multidimensional scaling and VOS
Nees Jan van Eck | Ludo Waltman | Rommert Dekker | Jan van den Berg
2010 Volume 61 Issue 12

2011

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Relations between the shape of a size-frequency distribution and the shape of a rank-frequency distribution
Leo Egghe | Ludo Waltman
2011 Volume 47 Issue 2

2012

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Universality of citation distributions revisited
Ludo Waltman | Nees Jan van Eck | Anthony F. J. van Raan
2012 Volume 63 Issue 1

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The inconsistency of the h-index
Ludo Waltman | Nees Jan van Eck
2012 Volume 63 Issue 2

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A new methodology for constructing a publication-level classification system of science
Ludo Waltman | Nees Jan van Eck
2012 Volume 63 Issue 12

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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
2012 Volume 63 Issue 12

2013

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On the calculation of percentile-based bibliometric indicators
Ludo Waltman | Michael Schreiber
2013 Volume 64 Issue 2

2014

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Systematic Retrieval of Scientific Literature based on Citation Relations: Introducing the CitNetExplorer Tool
Nees Jan van Eck | Ludo Waltman
Proceedings of the First Workshop on Bibliometric-enhanced Information Retrieval co-located with 36th European Conference on Information Retrieval (ECIR 2014), Amsterdam, The Netherlands, April 13, 2014

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F1000 Recommendations as a Potential New Data Source for Research Evaluation: A Comparison With Citations
Ludo Waltman | Rodrigo Costas
2014 Volume 65 Issue 3

2018

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The Closer the Better: Similarity of Publication Pairs at Different Cocitation Levels
Giovanni Colavizza | Kevin W. Boyack | Nees Jan van Eck | Ludo Waltman
2018 Volume 69 Issue 4

2019

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An Interactive Visual Tool for Scientific Literature Search: Proposal and Algorithmic Specification
Juan Pablo Bascur | Nees Jan van Eck | Ludo Waltman
Proceedings of the 8th International Workshop on Bibliometric-enhanced Information Retrieval (BIR 2019) co-located with the 41st European Conference on Information Retrieval (ECIR 2019), Cologne, Germany, April 14, 2019

2020

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Browsing Citation Clusters for Academic Literature Search: A Simulation Study with Systematic Reviews
Juan Pablo Bascur | Suzan Verberne | Nees Jan van Eck | Ludo Waltman
Proceedings of the 10th International Workshop on Bibliometric-enhanced Information Retrieval co-located with 42nd European Conference on Information Retrieval, BIR@ECIR 2020, Lisbon, Portugal, April 14th, 2020 [online only]

2021

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Algorithmic labeling in hierarchical classifications of publications: Evaluation of bibliographic fields and term weighting approaches
Peter Sjögårde | Per Ahlgren | Ludo Waltman
2021 Volume 72 Issue 7