%0 Journal Article %A S. B. Vakarchuk %T Approximations of differentiable functions of several variables %J Matematičeskie zametki %D 1990 %P 37-44 %V 48 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1990_48_3_a4/ %G ru %F MZM_1990_48_3_a4