%0 Journal Article
%A M. K. Potapov
%A F. M. Berisha
%T On the connection between a~$r$-order modulus of smoothness and the~best approximation by algebraic polynomials
%J Fundamentalʹnaâ i prikladnaâ matematika
%D 1999
%P 563-587
%V 5
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FPM_1999_5_2_a12/
%G ru
%F FPM_1999_5_2_a12