Yasuhito Mukouchi, Masako Sato. Learning Languages Generated by Elementary Formal Systems and Its Application to SH Languages. In Shai Ben-David, John Case, Akira Maruoka, editors, Algorithmic Learning Theory, 15th International Conference, ALT 2004, Padova, Italy, October 2-5, 2004, Proceedings. Volume 3244 of Lecture Notes in Computer Science, pages 380-394, Springer, 2004. [doi]