@article{1183503693, author = {Bell, P. O.}, title = {A characterization of the group of homographic transformations}, journal = {Bull. Amer. Math. Soc.}, volume = {47}, number = {11}, year = {1941}, pages = { 488-493}, language = {en}, url = {http://dml.mathdoc.fr/item/1183503693} }
Bell, P. O. A characterization of the group of homographic transformations. Bull. Amer. Math. Soc., Tome 47 (1941) no. 11, pp. 488-493. http://gdmltest.u-ga.fr/item/1183503693/