Juhani Karhumäki, Wojciech Plandowski, Filippo Mignosi. The Expressibility of Languages and Relations by Word Equations. In Pierpaolo Degano, Roberto Gorrieri, Alberto Marchetti-Spaccamela, editors, Automata, Languages and Programming, 24th International Colloquium, ICALP 97, Bologna, Italy, 7-11 July 1997, Proceedings. Volume 1256 of Lecture Notes in Computer Science, pages 98-109, Springer, 1997.
Abstract is missing.