TY  - JOUR
AU  - V. Jankovic
TI  - Necessary conditions for an extremum in the calculus of variations with nonsmooth phase variables
JO  - Matematičeskie zametki
PY  - 1997
SP  - 922
EP  - 930
VL  - 61
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1997_61_6_a11/
LA  - ru
ID  - MZM_1997_61_6_a11
ER  -