%0 Journal Article %A S. V. Bochkarev %T Classes of functions and Fourier coefficients with respect to complete orthonormal systems %J Matematičeskie zametki %D 1976 %P 445-463 %V 20 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1976_20_3_a17/ %G ru %F MZM_1976_20_3_a17