@article{1183424871, author = {Bell, E. T.}, title = {A partial isomorph of trigonometry}, journal = {Bull. Amer. Math. Soc.}, volume = {26}, number = {3}, year = {1919}, pages = { 311-321}, language = {en}, url = {http://dml.mathdoc.fr/item/1183424871} }
Bell, E. T. A partial isomorph of trigonometry. Bull. Amer. Math. Soc., Tome 26 (1919) no. 3, pp. 311-321. http://gdmltest.u-ga.fr/item/1183424871/