%0 Journal Article
%A V. N. Gabushin
%T The best approximation of the differentiation operator in the metric of~$L_p$
%J Matematičeskie zametki
%D 1972
%P 531-538
%V 12
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1972_12_5_a4/
%G ru
%F MZM_1972_12_5_a4