%0 Journal Article
%A P. V. Zaderej
%T Approximation of differentiable periodic functions of two variables by Fourier sums
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1987
%P 114-115
%V 180
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1987_180_a62/
%G ru
%F TM_1987_180_a62