%0 Journal Article
%A V. A. Il'in
%T A generalized principle of localization for the Riesz means of a Fourier series in an arbitrary fundamental system of functions of the Laplace operator with discrete spectrum
%J Differencialʹnye uravneniâ
%D 1970
%P 1143-1158
%V 6
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1970_6_7_a0/
%G ru
%F DE_1970_6_7_a0