%0 Journal Article %A V. N. Temlyakov %T Best approximations for functions of two variables %J Doklady Akademii Nauk %D 1975 %P 1079-1082 %V 223 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1975_223_5_a10/ %G ru %F DAN_1975_223_5_a10