%0 Journal Article %A S. P. Baiborodov %T On the approximation of functions of several variables by de la Vallee Poussin rectangular sums %J Doklady Akademii Nauk %D 1979 %P 265-267 %V 249 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1979_249_2_a0/ %G ru %F DAN_1979_249_2_a0