%0 Journal Article
%A G. A. Isaev
%A T. Yu. Kuliev
%T Analytic properties of the boundary of the numerical range of
%J Doklady Akademii Nauk
%D 1986
%P 1050-1053
%V 291
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1986_291_5_a5/
%G ru
%F DAN_1986_291_5_a5