Debnath, Lokenath. <br/><br/>
Introduction to hilbert spaces with applications, third edition / 
Lokenath Debnath, Piotr Mikusinski. 
 - 3rd ed. 
 - [S.l.] :  Academic Press,  2005. 
 - 600 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>0122084381 9780122084386 
<br/><br/><label>Dewey Class. No.: </label>515.733