L
Ludo Waltman
Researcher at Leiden University
Publications - 223
Citations - 30432
Ludo Waltman is an academic researcher from Leiden University. The author has contributed to research in topics: Citation analysis & Citation impact. The author has an hindex of 57, co-authored 212 publications receiving 20166 citations. Previous affiliations of Ludo Waltman include Erasmus University Rotterdam.
Papers
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Journal ArticleDOI
Software survey: VOSviewer, a computer program for bibliometric mapping.
TL;DR: VOSviewer’s ability to handle large maps is demonstrated by using the program to construct and display a co-citation map of 5,000 major scientific journals.
Journal ArticleDOI
From Louvain to Leiden: guaranteeing well-connected communities
TL;DR: In this article, the authors show that the Louvain algorithm may yield arbitrarily badly connected communities and, in the worst case, communities may even be disconnected, especially when running the algorithm iteratively.
Journal ArticleDOI
Bibliometrics: The Leiden Manifesto for research metrics
TL;DR: Zehn Grundsatze um Forschung zu bewerten, drangen Diana Hicks, Paul Wouters und Kollegen einiges zusammen wirkt.
Book ChapterDOI
Visualizing Bibliometric Networks
Nees Jan van Eck,Ludo Waltman +1 more
TL;DR: This chapter provides an introduction to the topic of visualizing bibliometric networks and focuses specifically on two software tools: VOSviewer and CitNetExplorer.
Journal ArticleDOI
A unified approach to mapping and clustering of bibliometric networks
TL;DR: In this paper, a unified approach to mapping and clustering of bibliometric networks is proposed, where the VOS mapping technique and a weighted and parameterized variant of modularity-based clustering can both be derived from the same underlying principle.