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.
Michael G. Main. Permutations Are Not Context-Free: An Application of the Interchange Lemma. Inf. Process. Lett., 15(2):68-71, 1982.