%0 Journal Article
%A G. G. Magaril-Il'yaev
%T Exact solutions of some approximation problems by means of positive operators
%J Matematičeskie zametki
%D 1990
%P 91-99
%V 48
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1990_48_3_a11/
%G ru
%F MZM_1990_48_3_a11