1
Nonlinear partial differential equations and their applications [E-Book] : College de France seminar volume XIV /
2
Convex analysis and variational problems [E-Book] /
Subject (ZB): ...Calculus of variations....

Full text 
3
Analyse convexe et ses applications: comptes rendus : Saint-Pierre-de-Chartreuse, 07.01.74-11.01.74 /
Book
...MLE - Calculus of variations...