Dimassi, M & Sjostrand, J <br/><br/>
Spectral asymptotics in the semi-classical limit 
M. Dimassi & J. Sjostrand 
 - Cambridge  Cambridge University Press  1999 
 - xi  227 
 - London mathematical society lecture note series 268 .
<br/><br/><label>ISBN: </label>9780521665445 
<br/><br/><label>Dewey Class. No.: </label>4.04+5.03+10.07  / DIMA