Kaufmann, A. <br/><br/>
Introduction to the theory of Fuzzy subsets  fundamental theoretical elements 

 - New York  Academic Press  1975 
 - 416 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Set theory
<br/><br/><label>Dewey Class. No.: </label>511.322  / KAI