%0 Journal Article
%A Svoboda, Karel
%T Remark to the characterization of the sphere in $E^4$
%J Commentationes Mathematicae Universitatis Carolinae
%D 1977
%P 715-722
%V 18
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1977__18_4_a7/
%G en
%F CMUC_1977__18_4_a7