TY - JOUR AU - A. M. Nakhushev TI - On a problem of mixed type for the equation $y(y-1)u_{xx}+u_{yy}=0$ JO - Doklady Akademii Nauk PY - 1966 SP - 536 EP - 539 VL - 166 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1966_166_3_a7/ LA - ru ID - DAN_1966_166_3_a7 ER -