J. D. Emerald, K. G. Subramanian, D. G. Thomas. Learning a Subclass of Context-Free Languages. In Vasant Honavar, Giora Slutzki, editors, Grammatical Inference, 4th International Colloquium, ICGI-98, Ames, Iowa, USA, July 12-14, 1998, Proceedings. Volume 1433 of Lecture Notes in Computer Science, pages 223-231, Springer, 1998. [doi]