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.
Stephen A. Cook. Path Systems and Language Recognition. In Conference Record of Second Annual ACM Symposium on Theory of Computing, 4-6 May 1970, Northampton, Massachusetts, USA. pages 70-72, ACM, 1970.