TY  - JOUR
AU  - Tóth, L. Fejes
AU  - Heppes, A.
TI  - A Variant of the Problem of the Thirteen Spheres
JO  - Canadian journal of mathematics
PY  - 1967
SP  - 1092
EP  - 1100
VL  - 19
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-100-x/
DO  - 10.4153/CJM-1967-100-x
ID  - 10_4153_CJM_1967_100_x
ER  -