TY  - JOUR
AU  - V. G. Boltyanskii
TI  - Necessary conditions for the extremum of a function
JO  - Differencialʹnye uravneniâ
PY  - 1972
SP  - 1553
EP  - 1559
VL  - 8
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1972_8_9_a2/
LA  - ru
ID  - DE_1972_8_9_a2
ER  -