%0 Journal Article %A A. M. Olevskii %T Coefficients of convergent orthogonal series in complete systems of functions %J Doklady Akademii Nauk %D 1960 %P 1021-1024 %V 133 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_133_5_a6/ %G ru %F DAN_1960_133_5_a6