%0 Journal Article %A B. A. Vostretsov %T Conditions for a function of many variables to be representable as a sum of a finite number %J Doklady Akademii Nauk %D 1963 %P 16-19 %V 153 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_153_1_a2/ %G ru %F DAN_1963_153_1_a2