http://findarticles.com/p/articles/mi_hb3328/is_201011/ai_n56442890
via
http://scienceintelligence.wordpress.com/2010/12/13/social-bookmarking-tools-for-scientists-a-test
Verglichen werden
CiteULike (http://www.citeulike.org),
Connotea (http://www.connotea.org),
BibSonomy (http://www.bibsonomy.org),
and 2collab (http://www.2collab.com).