Karel Culik II, Juhani Karhumäki, Jarkko Kari. A Note on Synchronized Automata and Road Coloring Problem. In Werner Kuich, Grzegorz Rozenberg, Arto Salomaa, editors, Developments in Language Theory, 5th International Conference, DLT 2001, Vienna, Austria, July 16-21, 2001, Revised Papers. Volume 2295 of Lecture Notes in Computer Science, pages 175-185, Springer, 2001. [doi]