M. Goldstein

[PDF] Structural Theory of Automata, Semigroups, and Universal Algebra: Proceedings of the NATO Advanced Study Institute on Structural Theory of Automata, Semigroups and Universal Algebra, Montreal, Quebec, Canada, 7-18 July 2003 (NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 207) M. Goldstein, Valery B. Kudryavtsev, Ivo G. Rosenberg