%0 Journal Article
%A L. V. Hörmander
%T On the Riesz means of spectral functions and eigenfunction expansions for elliptic differential operators
%J Matematika
%D 1968
%P 91-130
%V 12
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1968_12_5_a3/
%G ru
%F MAT_1968_12_5_a3