TY  - JOUR
AU  - M. J. Mardanov
TI  - On optimality conditions for singular equations
JO  - Doklady Akademii Nauk
PY  - 1980
SP  - 815
EP  - 818
VL  - 253
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1980_253_4_a9/
LA  - ru
ID  - DAN_1980_253_4_a9
ER  -