TY - JOUR AU - R. G. Barantsev TI - Expansion theorems connected with boundary problems for equation $u_{xx}-K(x)u_{tt}=0$ within the strip $0\le x\le1$ JO - Doklady Akademii Nauk PY - 1958 SP - 9 EP - 12 VL - 121 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1958_121_1_a0/ LA - ru ID - DAN_1958_121_1_a0 ER -