%0 Journal Article
%A V. V. Arestov
%T Approximation of linear operators, and related extremal problems
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1975
%P 29-42
%V 138
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1975_138_a1/
%G ru
%F TM_1975_138_a1