TY  - JOUR
AU  - D.H. Martin
TI  - Canonical Variables and Geodesic Fields for the Calculus of Variations of Multiple Integrals in Parametric.
JO  - Mathematische Zeitschrift
PY  - 1968
SP  - 16
EP  - 27
VL  - 104
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1968__104_170926/
ID  - MZ_1968__104_170926
ER  -