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.
Gheorghe Paun, Grzegorz Rozenberg, Takashi Yokomori. Hairpin Languages. Int. J. Found. Comput. Sci., 12(6):837-847, 2001.
Abstract is missing.