@article{1183487064, author = {Bell, E. T.}, title = {A ray of numerical functions of $r$ arguments}, journal = {Bull. Amer. Math. Soc.}, volume = {32}, number = {5}, year = {1926}, pages = { 341-345}, language = {en}, url = {http://dml.mathdoc.fr/item/1183487064} }
Bell, E. T. A ray of numerical functions of $r$ arguments. Bull. Amer. Math. Soc., Tome 32 (1926) no. 5, pp. 341-345. http://gdmltest.u-ga.fr/item/1183487064/