Partial differential equations VII:  spectral theory of differential equations/ 
M. A. Shubin (ed.). 
 - Berlin:  London:  Springer,  c1994. 
 - 272 p.: 
 - Encyclopaedia of mathematical sciences.  v. 64 .
<br/><br/><label>ISBN: </label>0387546774 3540546774 (Germany) 
<br/><br/><label>LCCN: </label>gb 95006669 
<br/><br/><label>Nat. Bib. No.: </label>GB95-6669 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial.<br/>Spectral theory (Mathematics).<br/>Differential operators.
<br/><br/><label>Dewey Class. No.: </label>515.353