Linz, Peter. <br/><br/>
An introduction to formal languages and automata 

 - 4th ed. 
 - New Delhi  Narosa Publishing House,  2006 
 - xiii+415 
<br/><br/><label>ISBN: </label>9788173197819 
<br/><br/><label>Dewey Class. No.: </label>001.6424   LIN;40