Partial differential equations and calculus of variations   
ed. by S. Hilderbrandt, R. Leis. 
 - Berlin  S-V  1988 
 - vi, 423p 
 - Lecture notes in mathematics  1357 .
<br/><br/><label>ISBN: </label>3540505083 
<br/><br/><label>Dewey Class. No.: </label>515.353  / N886