%0 Journal Article
%A V. V. Arestov
%T Approximation of unbounded operators by bounded operators and related extremal problems
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1996
%P 1093-1126
%V 51
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1996_51_6_a3/
%G en
%F RM_1996_51_6_a3