Muller-Pfeiffer, Erich  <br/><br/>
Spectral Theory of ordinary Differential Operators 
/ by Erich Muller-Pfeiffer 
 - England  Ellis Horwood Ltd.  1981 
 - 246p. 
<br/><br/><label>ISBN: </label>0853121893 
<br/><br/><label>Dewey Class. No.: </label>515.724  / MUL/S