%0 Journal Article
%A R.H. jr. Martin
%A J.H. III. Lightbourne
%T Projection Seminorms and the Field of Values of Linear Operators.
%J Numerische Mathematik
%D 1975
%P 151-162
%V 24
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1975__24_132335/
%F NUMA_1975__24_132335