6 citations · 11 across the 5 of their papers we have counts for
4 papers · 1 filter
Citation Analysis with Medical Subject Headings (MeSH) using the Web of Knowledge: A new routine
Loet Leydesdorff, Tobias Opthof
Citation analysis of documents retrieved from the Medline database (at the Web of Knowledge) has been possible only on a case-by-case basis. A technique is here developed for citat…
Scopus' SNIP Indicator
Loet Leydesdorff, Tobias Opthof
Rejoinder to Moed [arXiv:1005.4906]: Our main objection is against developing new indicators which, like some of the older ones (for example, the "crown indicator" of CWTS), do not…
Scopus's Source Normalized Impact per Paper (SNIP) versus a Journal Impact Factor based on Fractional Counting of Citations
Loet Leydesdorff, Tobias Opthof
Impact factors (and similar measures such as the Scimago Journal Rankings) suffer from two problems: (i) citation behavior varies among fields of science and therefore leads to sys…
Caveats for the journal and field normalizations in the CWTS ("Leiden") evaluations of research performance
Tobias Opthof, Loet Leydesdorff
The Center for Science and Technology Studies at Leiden University advocates the use of specific normalizations for assessing research performance with reference to a world average…