%0 Journal Article
%A D. L. Berman
%T Extremal properties in the theory of polynomial operators
%J Doklady Akademii Nauk
%D 1961
%P 747-750
%V 138
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1961_138_4_a1/
%G ru
%F DAN_1961_138_4_a1