%0 Journal Article
%A M. M. Dragilev
%T The order of the best approximation by linear combinations of elements of an extended basis to functions defined on a continuum
%J Doklady Akademii Nauk
%D 1961
%P 528-530
%V 139
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1961_139_3_a2/
%G ru
%F DAN_1961_139_3_a2