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.
Alasdair Urquhart. Hard examples for resolution. Journal of the ACM, 34(1):209-219, 1987. [doi]
Abstract is missing.