%0 Journal Article
%A S. Ya. Havinson
%T Approximation by elements of convex sets
%J Doklady Akademii Nauk
%D 1967
%P 294-297
%V 172
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_172_2_a11/
%G ru
%F DAN_1967_172_2_a11