%0 Journal Article %A R. N. Fadeev %T Necessary and sufficient conditions of belonging to the Besov--Potapov classes and Fourier coefficients with respect to multiplicative systems %J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics %D 2012 %P 41-48 %V 12 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ISU_2012_12_4_a7/ %G ru %F ISU_2012_12_4_a7