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.
Jürgen Dassow, Victor Mitrana, Gheorghe Paun, Ralf Stiebe. On differentiation functions, structure functions, and related languages of context-free grammars. ITA, 38(3):257-267, 2004. [doi]
Abstract is missing.