Hopcroft, John E. & Ullman, Jeffrey D. <br/><br/>
Introduction to automata theory, languages, and computation 

 - Addison-Wesley publishing company, London  1979 
 - x,418 
<br/><br/><label>ISBN: </label>0-201-02988-X 
<br/><br/><label>Dewey Class. No.: </label>001.535 Hop/Ull