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.
Thomas Ottmann, Arto Salomaa, Derick Wood. Sub-Regular Grammar Forms. Inf. Process. Lett., 12(4):184-187, 1981.