TY  - JOUR
AU  - K. B. Mansimov
TI  - Conditions for second-order optimality in Goursat--Darboux systems in the presence of constraints
JO  - Differencialʹnye uravneniâ
PY  - 1990
SP  - 954
EP  - 965
VL  - 26
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1990_26_6_a4/
LA  - ru
ID  - DE_1990_26_6_a4
ER  -