Kreyszig Erwin, <br/><br/>
Introductory functional analysis with applications 
by Erwin Kreyszig 
 - New York  John Wiley & Sons, Inc.  1978 
 - 688P. 
<br/><br/><label>ISBN: </label>0-471-03729-X 
<br/><br/><label>Dewey Class. No.: </label>B43  / L8