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.
Tao Jiang, Joel I. Seiferas, Paul M. B. Vitányi. Two heads are better than two tapes. Journal of the ACM, 44(2):237-256, 1997. [doi]