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.
Pawel Urzyczyn. Algorithmic triviality of abstract structures. Fundamenta Informaticae, 4(4):819-850, 1981.
Abstract is missing.