Hansen, Vagn Lundsgaard. <br/><br/>
Functional analysis :  entering hilbert space / 
Vagn Lundsgaard Hansen. 
 - [S.l.] :  World Scientific Pub Co Inc,  2006. 
 - 148 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>9812565639 9789812565631 
<br/><br/><label>Dewey Class. No.: </label>515.733