%0 Journal Article
%A A. V. Kolushov
%T Differential properties of the operator of best approximation of continuous functions by rational fractions
%J Matematičeskie zametki
%D 1987
%P 654-672
%V 41
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1987_41_5_a3/
%G ru
%F MZM_1987_41_5_a3