Apostol Constantin <br/><br/>
Approximation of Hilbert Space operators. 

 - V,Boston  Pitman Pub        1982 
 - V2,524p  cm. 
 - Research notes in mathematics.102 .
<br/><br/><label>Standard No.: </label>74418 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B313N, M2.2