%0 Journal Article %A V. Sh. Tsagareishvili %T On Fourier coefficients of functions with respect to general orthonormal systems %J Izvestiya. Mathematics %D 2017 %P 179-198 %V 81 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2017_81_1_a6/ %G en %F IM2_2017_81_1_a6