TY - JOUR AU - N. P. Korneichuk TI - Certain relations between the approximative characteristics of classes of periodic functions JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1975 SP - 115 EP - 123 VL - 134 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1975_134_a8/ LA - ru ID - TM_1975_134_a8 ER -