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.
Alfred V. Aho, Jeffrey D. Ullman. The Theory of Languages. Theory Comput. Syst., 2(2):97-125, 1968.
Abstract is missing.