Gilbarg,David <br/><br/>
Elliptic partial differential equations of second order 

 - Berlin  Springer-Verlag  2001 
 - xiii,515p.  24cm.PB. 
 - Classics in mathematics .
<br/><br/><label>ISBN: </label>3540411607 
<br/><br/><label>Dewey Class. No.: </label>515.353  / GIL