W – SCImago Journal & Country Rank , a new bibliometric indicator

SCImago Journal & Country Rank (SJR) a new tool in the universe of bibliometric indicators

SCImago is new portal of bibliometric indicators based on citations. Launched in December 2007, it is the result of a joint project between the SCImago group, with researchers of the Universities of Granada, Extremadura, Carlos III and Alcalá from Henares, in Spain, and Elsevier Publishing Co., from the Netherlands, the owner of Scopus. Indicators are based on citations among the scientific papers indexed in Scopus from 1996 to 2007, thus ranking the performance and impact of scientific journals and countries.