Alessandra Cherubini, Pawel Gawrychowski, Andrzej Kisielewicz, B. Piochi. A Combinatorial Approach to Collapsing Words. In Rastislav Kralovic, Pawel Urzyczyn, editors, Mathematical Foundations of Computer Science 2006, 31st International Symposium, MFCS 2006, Stará Lesná, Slovakia, August 28-September 1, 2006, Proceedings. Volume 4162 of Lecture Notes in Computer Science, pages 256-266, Springer, 2006. [doi]
Abstract is missing.