%0 Journal Article
%A E. G. Gol'shtein
%T Problems of best approximation by elements of a convex set and some properties of the support functionals
%J Doklady Akademii Nauk
%D 1967
%P 995-998
%V 173
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_173_5_a1/
%G ru
%F DAN_1967_173_5_a1