GILBARG,DAVID <br/><br/>
ELLIPTIC PARTIAL DIFFERENTIAL EQUATIONS OF SECOND ORDER 

 - BERLIN  SPRINGER-VERLAG  1998 
 - CLASSICS IN MATHEMATICS .
<br/><br/><label>ISBN: </label>3540411607 
<br/><br/><label>Dewey Class. No.: </label>515.353  / GIL