%0 Journal Article
%A D. L. Berman
%T Extremal problems in the theory of polynomial operators (non-periodic case)
%J Doklady Akademii Nauk
%D 1961
%P 519-521
%V 140
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1961_140_3_a0/
%G ru
%F DAN_1961_140_3_a0