%0 Journal Article
%A Crabb, M. J.
%A McGregor, C. M.
%T Numerical ranges of powers of hermitian elements
%J Glasgow mathematical journal
%D 1986
%P 37-45
%V 28
%N 1
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006315/
%R 10.1017/S0017089500006315
%F 10_1017_S0017089500006315