%0 Journal Article
%A Crabb, M. J.
%T Numerical range estimates for the norms of iterated operators
%J Glasgow mathematical journal
%D 1970
%P 85-87
%V 11
%N 2
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000896/
%R 10.1017/S0017089500000896
%F 10_1017_S0017089500000896