Muller-Pfeiffer, Erich <br/><br/>
Spectral theory of ordinary differential operations  / 

 - Chichester:  Ellis Horwood,  1981 
 - 246p. 
 - Ellis Horwood series in Mathematics and its applications. .
<br/><br/> "Translation" 
<br/><br/><label>Dewey Class. No.: </label>515.72  / M958.ST