%0 Journal Article
%A Yu. Sh. Abramov
%T Duality in spectral optimization and numerical ranges of a~family of self-adjoint operators
%J Zapiski Nauchnykh Seminarov POMI
%D 1982
%P 189-192
%V 107
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1982_107_a12/
%G ru
%F ZNSL_1982_107_a12