Helffer, B & Sjostrand, J <br/><br/>
Resonances en limite semi-classique 
B. Helffer & J. Sjostrand 
 - Paris  SMF  1986 
 - 227 
 - Memoire (nouvelle serie) 24/25 .
<br/><br/><label>ISBN: </label>2-04-012420-9 
<br/><br/><label>Dewey Class. No.: </label>13.01+5.03+4.12  / HELF