%0 Journal Article
%A Švec, Alois
%T Several new characterizations of the sphere
%J Czechoslovak Mathematical Journal
%D 1975
%P 645-652
%V 25
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1975.101360/
%R 10.21136/CMJ.1975.101360
%G en
%F 10_21136_CMJ_1975_101360