Hopcroft,John E. <br/><br/>
Introduction to Automata Theory, Languages, and Computation 

 - New Delhi  Narosa Publishing House  1989 
 - p.418 
<br/><br/><label>ISBN: </label>9788185015965 
<br/><br/><label>Subjects--Topical Terms: </label> Preliminaries  Finite Automata and Regular Expressions  Properties of Regular Sets  Intractable Problems 
<br/><br/><label>Dewey Class. No.: </label>621.38195 H81I