Introduction to automata theory, languages, and computation /  
John E Hopcroft, Jeffrey D. Ullman 
 - 1a. ed. 
 - Massachusetts :  Addison-Wesley,  1979 
 - 418 p. :    fig. ;    25 cm 
<br/><br/><label>ISBN: </label>03012988X 
<br/><br/><label>LC Class. No.: </label> / H 62 
<br/><br/><label>Universal Decimal Class. No.: </label>681.13