%0 Journal Article
%A N. K. Rakhmetov
%T Uniqueness of the element of best approximation in some function
%J Doklady Akademii Nauk
%D 1991
%P 553-557
%V 316
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1991_316_3_a8/
%G ru
%F DAN_1991_316_3_a8