Hopcroft, John E. <br/><br/>
Introduction to automata theory, languages, and computation / 
John E. Hopcroft, Rajeev Motwani and Jeffrey D. Ullman.  
 - 3rd ed. - 
 - India:  Dorling Kindersley,  c2008 (2018 printing). 
 - xvi, 487 p. :   ill. ;  23 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/><label>ISBN: </label>978-81-317-2047-9 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machine theory. <br/>Formal languages. <br/>Computational complexity.