%0 Journal Article %A S. V. Bochkarev %T A Fourier series in an arbitrary bounded orthonormal system that diverges on a set of positive measure %J Doklady Akademii Nauk %D 1975 %P 35-36 %V 225 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1975_225_1_a7/ %G ru %F DAN_1975_225_1_a7