Introduction to automata theory, languages, and computation /
Hopcroft, John E.,1939-
Motwani, Rajeev.
Ullman, Jeffrey D.,1942-
Upper Saddle River, N.J. : Pearson/Addison Wesley,
c2003.
Originally published: Addison Wesley Longman, c2001.
Includes index.
Machine theory.
Formal languages.
Computational complexity.