Schechter, Martin <br/><br/>
Spectra of Differential Operators 
Martin Schechter 
 - Amsterdam, Londra  North - Holland publishing ompany  1971 
 - 268 p  ill  22 cm 
 - Applied Mathematics and Mechanics  14 .
<br/><br/> Contine bibliografie si index 
<br/><br/><label>ISBN: </label>72042366x 444101098