books.google.com - This first volume of the Handbook of Formal Languages gives a comprehensive authoritative exposition on the core of language theory. Grammars, codes, power series, L systems, and combinatorics on words are all discussed in a thorough, yet self-contained manner. This is perhaps the most informative single...http://books.google.com/books/about/Handbook_of_Formal_Languages.html?id=yQ59ojndUt4C&utm_source=gb-gplus-shareHandbook of Formal Languages
