%0 Journal Article %A V. A. Il'in %T A localization principle for almost the whole sequence of partial sums of a Fourier series in a fundamental system of functions %J Doklady Akademii Nauk %D 1969 %P 20-23 %V 184 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_184_1_a3/ %G ru %F DAN_1969_184_1_a3