%0 Journal Article
%A Vitalii V. Arestov
%T On the best approximation of the differentiation operator
%J Ural mathematical journal
%D 2015
%P 20-29
%V 1
%N 1
%U http://geodesic.mathdoc.fr/item/UMJ_2015_1_1_a1/
%G en
%F UMJ_2015_1_1_a1