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.
Jin-yi Cai, Lane A. Hemaspaandra, Gerd Wechsung. Robust Reductions. Theory Comput. Syst., 32(6):625-647, 1999. [doi]
Abstract is missing.