%0 Journal Article %A A. V. Andrianov %T An analog of the Jackson--Nikol'skii theorem on the approximation by superpositions of sigmoidal functions %J Matematičeskie zametki %D 1996 %P 915-918 %V 59 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1996_59_6_a12/ %G ru %F MZM_1996_59_6_a12