Zimmermann, H. -J. <br/><br/>
Fuzzy Set Theory:  and Its Applications 
H. -J. Zimmermann 
 - 4th Ed. 
 - Delhi, India  Springer  2006 
 - 514p, 
<br/><br/><label>ISBN: </label>0792374355 
<br/><br/><label>Standard No.: </label>8181285190 
<br/><br/><label>Dewey Class. No.: </label>511.322