TY  - JOUR
AU  - Katsumi Nomizu
TI  - A Characterization of n-Spheres in Space Forms and Its Complex Analogue.
JO  - Mathematische Annalen
PY  - 1973
SP  - 75
EP  - 80
VL  - 201
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1973__201_162373/
ID  - MAN_1973__201_162373
ER  -