Glazman I M <br/><br/>
Direct methods of qualitative spectral analysis of singular differential operators 
Glazman I M 
 -  1952 
 - p.  cm. 
 - Isreal program for scientofic translations .
<br/><br/><label>Standard No.: </label>21979 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B313, K52