%0 Journal Article
%A R. R. Ashurov
%T An asymptotic estimate in $L_2$ for the Riesz means of the spectral function of an elliptic operator
%J Differencialʹnye uravneniâ
%D 1989
%P 3-14
%V 25
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1989_25_1_a0/
%G ru
%F DE_1989_25_1_a0