%0 Journal Article
%A E. G. Gol'shtein
%T A general formulation of the best approximation problem
%J Doklady Akademii Nauk
%D 1962
%P 21-22
%V 144
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_144_1_a4/
%G ru
%F DAN_1962_144_1_a4