TY - JOUR AU - N. A. Bokaev AU - M. A. Nurkhanov TI - Example of a null-series with respect to periodic multiplicative systems JO - Matematičeskie zametki PY - 1993 SP - 3 EP - 9 VL - 54 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1993_54_6_a0/ LA - ru ID - MZM_1993_54_6_a0 ER -