TY  - JOUR
AU  - H.S.P. Grässer
TI  - The complete figure for second order multiple integral problems in the calculus of variations.
JO  - Aequationes mathematicae
PY  - 1976
SP  - 363
EP  - 386
VL  - 14
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1976__14_136598/
ID  - AM2_1976__14_136598
ER  -