h-index aims to provide a robust single-number metric of an academic's impact, combining quality with quantity.
h = number of papers with citation number higher or equal to h. Ex : a scientist with an h-index of 25 has published 25 articles that have each attracted at least 25 citations.
2,696 authors
4 categories
1960 - 2010
570,115 publications
70,124,145 citations
Last updated : May 12, 2010

Authors publishing since more than 20 years : first paper in or before 1990.

Authors publishing since 10 to 20 years : first paper between 1991 and 2000.
Due mainly to homonyms, errors are possible and if you detect "false positives" or "false negatives" don't be too frustrated and please contact the webmaster.