@article{1102906360, author = {Alexander, Ralph}, title = {Generalized sums of distances.}, journal = {Pacific J. Math.}, volume = {61}, number = {2}, year = {1975}, pages = { 297-304}, language = {en}, url = {http://dml.mathdoc.fr/item/1102906360} }
Alexander, Ralph. Generalized sums of distances.. Pacific J. Math., Tome 61 (1975) no. 2, pp. 297-304. http://gdmltest.u-ga.fr/item/1102906360/