Steinfeld, Ottó <br/><br/>
Quasi-ideals in rings and semigroups/ 
Ottó Steinfeld. 
 - Budapest:  Akadémiai Kiadó,  1978. 
 - xi, 154 p. ;  25 cm. 
 - Disquisitiones mathematicae Hungaricae;  10. .
<br/><br/> Includes indexes. 
<br/><br/>Bibliography: p. 143-147. 
<br/><br/><label>ISBN: </label>9630516969 
<br/><br/><label>LCCN: </label>79308570 
<br/><br/><label>Nat. Bib. No.: </label>H*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Associative rings.<br/>Semigroups;<br/>Ideals (Algebra)
<br/><br/><label>Dewey Class. No.: </label>512.4