Antonio Restivo, Christophe Reutenauer. Cancellation, Pumping and Permutation in Formal Languages. In Jan Paredaens, editor, Automata, Languages and Programming, 11th Colloquium, Antwerp, Belgium, July 16-20, 1984, Proceedings. Volume 172 of Lecture Notes in Computer Science, pages 414-422, Springer, 1984.
Abstract is missing.