TY - JOUR AU - F. S. Lisin TI - Problem of mean-square approximation related to the investigation of generators of $l^1$ algebra JO - Matematičeskie zametki PY - 1968 SP - 703 EP - 706 VL - 3 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1968_3_6_a9/ LA - ru ID - MZM_1968_3_6_a9 ER -