Introduction to formal languages, automata theory and computation/ 
Kamala Krithivasan, Rama R 
 - Chennai:  Pearson  2009 
 - xiii, 425p.; 
<br/><br/><label>ISBN: </label>9 788131 723562 
<br/><br/><label>Dewey Class. No.: </label>519.713  / KRI