%0 Journal Article
%A V. V. Lipovik
%T The order of approximation in the strong sense of periodic functions of two variables by Fourier sums and by certain interpolation sums
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1970
%P 43-49
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1970_3_a6/
%G ru
%F IVM_1970_3_a6