@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/