@article{1102945696, author = {Berg, Gordon O.}, title = {Metric characterizations of Euclidean spaces.}, journal = {Pacific J. Math.}, volume = {49}, number = {2}, year = {1973}, pages = { 11-28}, language = {en}, url = {http://dml.mathdoc.fr/item/1102945696} }
Berg, Gordon O. Metric characterizations of Euclidean spaces.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 11-28. http://gdmltest.u-ga.fr/item/1102945696/