%0 Journal Article
%A V. V. Zhuk
%T Certain sharp inequalities between best approximations
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1973
%P 51-56
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1973_1_a5/
%G ru
%F IVM_1973_1_a5