%0 Journal Article
%A V. A. Il'in
%T Conditions for the convergence of spectral decompositions that correspond to self-adjoint extensions of elliptic operators. III.~Best possible local estimates of Riesz means of an arbitrary function from the class $L_2(G)$ for a self-adjoint extension of the Laplace operator
%J Differencialʹnye uravneniâ
%D 1971
%P 1036-1041
%V 7
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1971_7_6_a10/
%G ru
%F DE_1971_7_6_a10