Kreyszig, Erwin. <br/><br/>
Introductory functional analysis with applications / 
Erwin Kreyszig. 
 - 1st ed. 
 - [S.l.] :  Wiley,  2001 
 - 704 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>0471504599 9780471504597 
<br/><br/><label>Dewey Class. No.: </label>515.7