Introduction to automata theory, languages, and computation 
Hopcroft, john E ; Motwani, rajeev 
 - 3rd ed 
 - south asia  [publisher not identified]  2004 
 - xvi, 487p. ; 26cm 
<br/><br/><label>ISBN: </label>9789332535862 
<br/><br/><label>Dewey Class. No.: </label>006.3 HOP