For those who want to dive further in automata theory, transducers and the non-commutative algebraic view of the theory, the following one by J. Sakarovitch is

For those who want to dive further in automata theory, transducers and the non-commutative algebraic view of the theory, the following one by J. Sakarovitch is a fantastic book : http://www.cambridge.org/uk/catalogue/catalogue.asp?isbn=9780521844253 http://www.cambridge.org/uk/catalogue/catalogue.asp?isbn=978...