%0 Journal Article
%A V. V. Tikhomirov
%T On the Riesz means of expansions in a trigonometric Fourier series and in the eigenfunctions of a Keldys pencil of ordinary nonselfadjoint differential operators
%J Doklady Akademii Nauk
%D 1976
%P 1015-1017
%V 226
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1976_226_5_a6/
%G ru
%F DAN_1976_226_5_a6