TY - JOUR AU - Sh. A. Alimov TI - On smoothness of the solution of a degenerate problem with a directional derivative JO - Differencialʹnye uravneniâ PY - 1987 SP - 10 EP - 22 VL - 23 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1987_23_1_a1/ LA - ru ID - DE_1987_23_1_a1 ER -