TY - JOUR AU - Yu. N. Subbotin TI - A~relation between spline approximation and the problem of the approximation of one class by another JO - Matematičeskie zametki PY - 1971 SP - 501 EP - 510 VL - 9 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1971_9_5_a3/ LA - ru ID - MZM_1971_9_5_a3 ER -