TY - JOUR AU - S. V. Uspenskii TI - Differential properties for solutions of a class of partial differential equations in unbounded regions JO - Doklady Akademii Nauk PY - 1971 SP - 61 EP - 64 VL - 196 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1971_196_1_a15/ LA - ru ID - DAN_1971_196_1_a15 ER -