%0 Journal Article
%A V. V. Arestov
%T Best approximation of unbounded by bounded operators, and allied problems
%J Matematičeskie zametki
%D 1986
%P 269-285
%V 40
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1986_40_2_a11/
%G ru
%F MZM_1986_40_2_a11