TY - JOUR AU - L. V. Ul'yanova TI - Summation and absolute summation of numerical sequences by Riesz method JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1989 SP - 76 EP - 78 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1989_12_a16/ LA - ru ID - IVM_1989_12_a16 ER -