%0 Journal Article
%A Marvin Marcus
%T Pencils of real symmetric matrices and the numerical range. (Short Communication).
%J Aequationes mathematicae
%D 1977
%P 193-193
%V 16
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1977__16_136693/
%F AM2_1977__16_136693