Zimmermann,H.J. <br/><br/>
Fuzzy set theory and its applications / 
Zimmermann,H.J. 
 - 4th ed 
 - Boston:  Kluwer academic publishers,  2001. 
 - xxv,399p;26cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0792374355 
<br/><br/><label>Dewey Class. No.: </label>511.322 ZIM