TY  - JOUR
AU  - F. P. Vasil'ev
TI  - Optimality conditions for certain classes of systems which are not solved with respect to the derivative
JO  - Doklady Akademii Nauk
PY  - 1969
SP  - 1267
EP  - 1270
VL  - 184
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1969_184_6_a1/
LA  - ru
ID  - DAN_1969_184_6_a1
ER  -