Aditi Barthwal, Michael Norrish. A Formalisation of the Normal Forms of Context-Free Grammars in HOL4. In Anuj Dawar, Helmut Veith, editors, Computer Science Logic, 24th International Workshop, CSL 2010, 19th Annual Conference of the EACSL, Brno, Czech Republic, August 23-27, 2010. Proceedings. Volume 6247 of Lecture Notes in Computer Science, pages 95-109, Springer, 2010. [doi]
Abstract is missing.