%0 Journal Article
%A Z. Ditzian
%A S. Tikhonov
%T Moduli of smoothness of functions and their derivatives
%J Studia Mathematica
%D 2007
%P 143-160
%V 180
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/sm180-2-4/
%R 10.4064/sm180-2-4
%G en
%F 10_4064_sm180_2_4