TY  - JOUR
AU  - M. M. Khapaev
TI  - Singular differential equations in problems on the investigation
JO  - Doklady Akademii Nauk
PY  - 1992
SP  - 250
EP  - 252
VL  - 323
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1992_323_2_a12/
LA  - ru
ID  - DAN_1992_323_2_a12
ER  -