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. Variations on Pushdown Machines (Detailed Abstract). In Conference Record of ACM Symposium on Theory of Computing, 5-7 May 1969, Marina del Rey, California, USA. pages 229-231, ACM, 1969.
Abstract is missing.