Barros-Neto, J & Artino, R. A <br/><br/>
Hypoelliptic boundary-value problems 
J. Barros-Neto & R.A. Artino 
 - New York  Marcel Dekker  1980 
 - v  90 
 - Lecture notes in pure & applied mathematics 53 .
<br/><br/><label>ISBN: </label>0824768868 
<br/><br/><label>Dewey Class. No.: </label>10.02  / BARR