TY - JOUR AU - V. N. Spevakov TI - Absolute summation of orthogonal series by Riesz methods JO - Issledovaniya po Prikladnoi Matematike i Informatike PY - 1973 SP - 109 EP - 116 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KUIPM_1973_a15/ LA - ru ID - KUIPM_1973_a15 ER -