TY  - JOUR
AU  - Herbert Abels
AU  - Annette Lauer
TI  - A Characterization of the Sphere and Euclidean Space by Transformation Groups.
JO  - Mathematische Zeitschrift
PY  - 1976
SP  - 137
EP  - 142
VL  - 146
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1976__146_172302/
ID  - MZ_1976__146_172302
ER  -