Ellis, Robert L. <br/><br/>
Orthogonal systems and convolution operators   
by Robert L. Ellis, Israel Gohberg 
 - Basel  Birkhauser Verlag  2002 
 - ix, 236p. 
 - Operator theory  advances and applications  v. 140 .
<br/><br/><label>ISBN: </label>3764369299 
<br/><br/><label>Dewey Class. No.: </label>515.55  / P03