Hopcroft, John E. Introduction to automata theory, languages, and computation / John E. Hopcroft, Rajeev Motwani and Jeffrey D. Ullman. - 3rd ed. - Delhi : Pearson Education, c2008. - xvi, 487 p. : ill. ; 25 cm. Includes bibliographical references and index. ISBN: 9780321455369 (pbk.) 9788131720479 (pbk.) Subjects--Topical Terms: Machine theory.Formal languages.Computational complexity. Dewey Class. No.: 005.131 / HOP/I