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

 - New Delhi  Narosa Publishing House  1979 
 - 418 
<br/><br/><label>ISBN: </label>8185015961 
<br/><br/><label>Publisher. No.: </label> Super Book Service 
<br/><br/><label>Subjects--Personal Names: </label> Computer Science  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer Science