Bibliometrics and Citation Analysis : Journal Metrics
Resources to help researchers measure journal, article, and author impact factors. Includes traditional citation evaluation as well as alternative methods.
Ranks scholarly and technical journals based on their impact factor (how often the journal is cited), immediacy index (how quickly an article is cited), and other criteria. Updated annually.
Caveats: Various criticisms have been raised about impact factor, including its validity (it is highly discipline-dependent) and the effect that journal editorial policies can have on it (policies can potentially boost a journal's impact factor).
A publicly available portal that includes the journals and country scientific indicators developed from the information contained in the Scopus database
Caveats: Uses Scopus citations only from 1996-present. Divides the prestige gained by a journal, through the citations of its articles, to the total number of articles included, rather than to the number of citable articles.