TY - JOUR AU - V. N. Spevakov AU - A. B. Kudryavtsev TI - Absolute summability of orthogonal series by Euler’s method JO - Matematičeskie zametki PY - 1977 SP - 51 EP - 56 VL - 21 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1977_21_1_a5/ LA - ru ID - MZM_1977_21_1_a5 ER -