%0 Journal Article
%A Heppes, Aladár
%T On the Number of Spheres Which can Hide a Given Sphere
%J Canadian journal of mathematics
%D 1967
%P 413-418
%V 19
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-033-4/
%R 10.4153/CJM-1967-033-4
%F 10_4153_CJM_1967_033_4