TY  - JOUR
AU  - E.T. DAVIES
TI  - A Geometrical Theory of Multiple Integral Problems in the Calculus of Variations
JO  - Aequationes mathematicae
PY  - 1971
SP  - 173
EP  - 181
VL  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1971__7_136250/
ID  - AM2_1971__7_136250
ER  -