%0 Journal Article %A V. A. Rvachev %T Atomic functions and approximation theory %J Informatics and Automation %D 1987 %P 186-187 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a112/ %G ru %F TRSPY_1987_180_a112