Authors : Martijn Visser, Nees Jan van Eck, Ludo Waltman We present a large-scale comparison of five multidisciplinary bibliographic data sources: Scopus, Web o...
Authors : Ludo Waltman, Vincent A. Traag Most scientometricians reject the use of the journal impact factor for assessing individual articles and their authors....
Authors : Yi Bu, Ludo Waltman, Yong Huang The citation impact of scientific publications is usually seen as a one-dimensional concept. We introduce a three-dime...
Authors : Vincent Traag, Ludo Waltman When performing a national research assessment, some countries rely on citation metrics whereas others, such as the UK, pr...
Authors : Caspar Chorus, Ludo Waltman Based on three decades of citation data from across scientific fields of science, we study trends in impact factor biased ...