%0 Journal Article %A A. B. Ugol'nikov %T Realization of functions from closed classes by schemes of %J Doklady Akademii Nauk %D 1983 %P 49-51 %V 271 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1983_271_1_a10/ %G ru %F DAN_1983_271_1_a10