Shubin, M. A. <br/><br/>
Pseudodifferential operators and spectral theory   
by M A Shubin 
 - 2nd ed 
 - New York  Springer  2001 
 - xii, 288p. 
<br/><br/><label>ISBN: </label>354041195X 
<br/><br/><label>Dewey Class. No.: </label>515.7242  / P01