TY - JOUR AU - V. F. Gaposhkin TI - The order of approximation by partial sums of lacunary series in Banach spaces JO - Matematičeskie zametki PY - 1970 SP - 575 EP - 582 VL - 8 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1970_8_5_a4/ LA - ru ID - MZM_1970_8_5_a4 ER -