TY  - JOUR
AU  - M. M. Khapaev
TI  - Singular differential equations in control problems with
JO  - Doklady Akademii Nauk
PY  - 1992
SP  - 1166
EP  - 1168
VL  - 324
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1992_324_6_a5/
LA  - ru
ID  - DAN_1992_324_6_a5
ER  -