TY  - JOUR
AU  - J. E. Valentine
AU  - S. G. Wayment
TI  - Metric characterizations of hyperbolic and Euclidean spaces
JO  - Colloquium Mathematicum
PY  - 1972
SP  - 259
EP  - 264
VL  - 25
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-25-2-259-264/
DO  - 10.4064/cm-25-2-259-264
LA  - en
ID  - 10_4064_cm_25_2_259_264
ER  -