Calculus of variations and partial differential equations proceedings of a conference held in Trento, Italy, June 16-21, 1986 / S. Hildebrandt, D. Kinderlehrer, M. Miranda (eds.). - Hildebrandt, Stefan; Kinderlehrer, David; Miranda, Mario, 1937- (Lecture notes in mathematics (Springer-Verlag) ;, 1988)