Special Classes of Linear Operators and Other Topics 
H. Helson;  C.M.Pearcy; E.H.Vasilescu; D. Vasilescu 
 - Basel, Boston, Berlin  Birkhauser  1988 
 - 322 p  23 cm 
 - Operator Theory: Advances and Applications  28 .
<br/><br/><label>ISBN: </label>3764319704