%0 Journal Article
%A A. G. Vitushkin
%T The closest approximations of differentiable and analytic functions
%J Doklady Akademii Nauk
%D 1958
%P 418-420
%V 119
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1958_119_3_a3/
%G ru
%F DAN_1958_119_3_a3