%0 Journal Article
%A V. A. Il'in
%T Necessary and sufficient conditions for spatial decompositions to be bases and to be equiconvergent with a trigonometric series.~I
%J Differencialʹnye uravneniâ
%D 1980
%P 771-794
%V 16
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1980_16_5_a0/
%G ru
%F DE_1980_16_5_a0