%0 Journal Article
%A V. A. Il'in
%T A generalized principle of localization for the Riesz means that correspond to an arbitrary selfadjoint nonnegative extension of the Laplace operator
%J Differencialʹnye uravneniâ
%D 1970
%P 1159-1169
%V 6
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1970_6_7_a1/
%G ru
%F DE_1970_6_7_a1