Du, Ding-Zhu <br/><br/>
Problem solving in automata, languages, and complexity / 
Ding-Zhu Du, Ker-I Ko 
 - New York:  John Wiley & Sons  2001 
 - viii, 396p.; 
<br/><br/><label>ISBN: </label>9 780471 439608 
<br/><br/><label>Dewey Class. No.: </label>519.713  / DU