%0 Journal Article
%A Anders Olofsson
%T An extremal problem in Banach algebras
%J Studia Mathematica
%D 2001
%P 255-264
%V 145
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/sm145-3-5/
%R 10.4064/sm145-3-5
%G de
%F 10_4064_sm145_3_5