Hopcroft, John E. Introduction to automata theory, languages, and computation / John E. Hopcroft, Rajeev Motwani and Jeffrey D. Ullman. - 3rd ed. - New Delhi : Pearson, c2009. - xvi, 487 pages : illustrations ; 25 cm. Includes index. ISBN: 9788131720479 Subjects--Topical Terms: Machine theory.Formal languages.Computational complexity. Dewey Class. No.: 511.35 HOP