Balázs Imreh, Masami Ito, Masashi Katsura. On Shuffle Closure of Commutative Regular Languages. In Douglas S. Bridges, Cristian S. Calude, Jeremy Gibbons, Steve Reeves, Ian H. Witten, editors, First Conference of the Centre for Discrete Mathematics and Theoretical Computer Science, DMTCS 1996, Auckland, New Zealand, December, 9-13, 1996. pages 276-288, Springer-Verlag, Singapore, 1996.
Abstract is missing.