%0 Journal Article
%A Đinh Dung
%T Best linear methods for approximation of classes of periodic functions of several variables
%J Matematičeskie zametki
%D 1987
%P 646-653
%V 41
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1987_41_5_a2/
%G ru
%F MZM_1987_41_5_a2