@article{bwmeta1.element.desklight-985e73fd-d98a-4c64-bb1a-40adfc5ae8e3,
author = {J. E. Valentine and S. G. Wayment},
title = {Metric characterizations of hyperbolic and Euclidean spaces},
journal = {Colloquium Mathematicae},
volume = {25},
year = {1972},
pages = {259-264},
zbl = {0219.50010},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-985e73fd-d98a-4c64-bb1a-40adfc5ae8e3}
}
J. E. Valentine; S. G. Wayment. Metric characterizations of hyperbolic and Euclidean spaces. Colloquium Mathematicae, Tome 25 (1972) pp. 259-264. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-985e73fd-d98a-4c64-bb1a-40adfc5ae8e3/