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.
Clara M. Chu, Ann O'Brien. Subject analysis: the critical first stage in indexing. J. Information Science, 19(6):439-454, 1993. [doi]