%0 Journal Article
%A D. L. Berman
%T Solution of an extremal problem in operator theory
%J Doklady Akademii Nauk
%D 1982
%P 777-781
%V 265
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1982_265_4_a0/
%G ru
%F DAN_1982_265_4_a0