%0 Journal Article
%A M. Sh. Shabozov
%A О. А. Jurakhonov
%T Upper estimates for best mean-square approximations for some classes of bivariate functions by Fourier-Chebyshev sums
%J Trudy Instituta matematiki i mehaniki
%D 2020
%P 268-278
%V 26
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TIMM_2020_26_4_a18/
%G ru
%F TIMM_2020_26_4_a18