Frank Drewes, Hans-Jörg Kreowski, Denis Lapoire. Criteria to Disprove Context-Freeness of Collage Languages. In Bogdan S. Chlebus, Ludwik Czaja, editors, Fundamentals of Computation Theory, 11th International Symposium, FCT 97, Kraków, Poland, September 1-3, 1997, Proceedings. Volume 1279 of Lecture Notes in Computer Science, pages 169-178, Springer, 1997.
Abstract is missing.