TY  - JOUR
AU  - A. M. Rubinov
TI  - Necessary conditions for an extremum and their application to the investigation of certain equations
JO  - Doklady Akademii Nauk
PY  - 1966
SP  - 533
EP  - 535
VL  - 169
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1966_169_3_a10/
LA  - ru
ID  - DAN_1966_169_3_a10
ER  -