Akhiezer N I <br/><br/>
Theory of linear operators in Hilbert spaces.2V. 

 -  1981 
<br/><br/><label>Standard No.: </label>14409 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B313N, M1.1-.2