%0 Journal Article
%A A. P. Buslaev
%T Extremal problems in approximation theory, and nonlinear
%J Doklady Akademii Nauk
%D 1989
%P 1289-1294
%V 305
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1989_305_6_a0/
%G ru
%F DAN_1989_305_6_a0