Mlak, Wlodzimierz. <br/><br/>
Hilbert spaces and operator theory   
by Wlodzimierz Mlak 
 - Dordrecht  Kluwer Academic Pub./ PWN  1991 
 - xi, 289p. 
 - Mathematics and its applications  Vol.51 .
<br/><br/><label>ISBN: </label>079231042X 
<br/><br/><label>Dewey Class. No.: </label>515.733  / N91