Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Danah M. Boyd, Nicole Ellison. Social Network Sites: Definition, History, and Scholarship. J. Computer-Mediated Communication, 13(1):210-230, 2007. [doi]
Abstract is missing.