%0 Journal Article
%A V. Pellegrini
%T Numerical range preserving operators on a Banach algebra
%J Studia Mathematica
%D 1975
%P 143-147
%V 54
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/sm-54-2-143-147/
%R 10.4064/sm-54-2-143-147
%G en
%F 10_4064_sm_54_2_143_147