%0 Journal Article
%A Svoboda, Karel
%T Contribution to the characterization of the sphere in $E^3$
%J Archivum mathematicum
%D 1979
%P 171-177
%V 15
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ARM_1979__15_3_a5/
%G en
%F ARM_1979__15_3_a5