Knebusch, Manfred. <br/><br/>
Wittrings/ 
Manfred Knebusch, Manfred Kolster. 
 - Braunschweig:  Vieweg,  1982. 
 - xi, 96 p. ;  23 cm. 
 - Aspects of mathematics;  E2. .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 88-92. 
<br/><br/><label>ISBN: </label>3528085126 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rings (Algebra)
<br/><br/><label>Dewey Class. No.: </label>512.4