J. E. Valentine, and S. G. Wayment. "Metric characterizations of hyperbolic and Euclidean spaces." Colloquium Mathematicae 25.2 (1972): 259-264. <http://eudml.org/doc/265997>.
@article{J1972, author = {J. E. Valentine, S. G. Wayment}, journal = {Colloquium Mathematicae}, language = {eng}, number = {2}, pages = {259-264}, title = {Metric characterizations of hyperbolic and Euclidean spaces}, url = {http://eudml.org/doc/265997}, volume = {25}, year = {1972}, }
TY - JOUR AU - J. E. Valentine AU - S. G. Wayment TI - Metric characterizations of hyperbolic and Euclidean spaces JO - Colloquium Mathematicae PY - 1972 VL - 25 IS - 2 SP - 259 EP - 264 LA - eng UR - http://eudml.org/doc/265997 ER -