%0 Journal Article
%A Th. Friedrich
%T A characterization of the disc $D^n$
%J Colloquium Mathematicum
%D 1974
%P 77-81
%V 32
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-32-1-77-81/
%R 10.4064/cm-32-1-77-81
%G en
%F 10_4064_cm_32_1_77_81