TY  - JOUR
AU  - A. V. Babin
TI  - On the smoothness of solutions of differential equations at singular points of the boundary of the domain
JO  - Izvestiya. Mathematics 
PY  - 1991
SP  - 489
EP  - 510
VL  - 37
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1991_37_3_a1/
LA  - en
ID  - IM2_1991_37_3_a1
ER  -