TY  - JOUR
AU  - Rund, H.
TI  - A Geometrical Theory of Multiple Integral Problems in the Calculus of Variations
JO  - Canadian journal of mathematics
PY  - 1968
SP  - 639
EP  - 657
VL  - 20
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-062-1/
DO  - 10.4153/CJM-1968-062-1
ID  - 10_4153_CJM_1968_062_1
ER  -