TY  - JOUR
AU  - Svoboda, Karel
TI  - Remark to the characterization of the sphere in $E^4$
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1977
SP  - 715
EP  - 722
VL  - 18
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1977__18_4_a7/
LA  - en
ID  - CMUC_1977__18_4_a7
ER  -