%0 Journal Article
%A A. N. Davidchik
%A A. A. Ligun
%T Approximation of periodic functions by linear operators
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1987
%P 98-99
%V 180
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1987_180_a53/
%G ru
%F TM_1987_180_a53