%0 Journal Article
%A A. I. Zvyagintsev
%T Extremal problem of the norm of an intermediate derivative
%J Matematičeskie zametki
%D 1991
%P 45-54
%V 49
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1991_49_2_a5/
%G ru
%F MZM_1991_49_2_a5