Rofe-Beketov, Fedor S <br/><br/>
Spectral analysis of differential operators  interplay between spectral and oscillatory properties 
by Fedor S Rofe-Beketov and Aleksandr M Kholkin 
 - New Jersey  WS  2005 
 - xxiii, 438p 
 - World scientific monograph series in mathematics. V.7 .
<br/><br/><label>ISBN: </label>9812562761 
<br/><br/><label>Dewey Class. No.: </label>515.7242  / P05