Vopenka, Petr. <br/><br/>
The theory of semisets/ 
Petr Vopčnka and Petr Hájek. 
 - Amsterdam:  North-Holland,  1972. 
 - 332 p.:  23 cm. 
 - Studies in logic and the foundations of mathematics;  v. 70. .
<br/><br/>Bibliography: p. 324-325. 
<br/><br/><label>ISBN: </label>0720422671 
<br/><br/><label>LCCN: </label>77157005 
<br/><br/><label>Nat. Bib. No.: </label>Ne*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Set theory.<br/>Teoria dos Conjuntos
<br/><br/><label>Dewey Class. No.: </label>511.3  / V952t