Banach algebra techniques in operator theory  
Douglas, Ronald G. 
 - 2nd ed. 
 - New York :  Springer,  1998 
 - xvi, 194 p. :  ill. ;  25 cm. 
 - Graduate texts in mathematics ;  179 .
<br/><br/><label>ISBN: </label>0387983775 (hardcover : alk. paper)