TY  - JOUR
AU  - E. R. Avakov
TI  - First-order necessary conditions for abnormal problems in the calculus of variations
JO  - Differencialʹnye uravneniâ
PY  - 1991
SP  - 739
EP  - 745
VL  - 27
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1991_27_5_a0/
LA  - ru
ID  - DE_1991_27_5_a0
ER  -