%0 Journal Article
%A A. S. Kats
%T Best approximation to an element in a~Banach space by a system of seminorm
%J Matematičeskie zametki
%D 1979
%P 377-388
%V 26
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1979_26_3_a6/
%G ru
%F MZM_1979_26_3_a6