%0 Journal Article %A N. A. Bokaev %A M. A. Nurkhanov %T Example of a null-series with respect to periodic multiplicative systems %J Matematičeskie zametki %D 1993 %P 3-9 %V 54 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1993_54_6_a0/ %G ru %F MZM_1993_54_6_a0