@article{1183415280, author = {Beman, W. W.}, title = {Euler's use of $i$ to represent an imaginary}, journal = {Bull. Amer. Math. Soc.}, volume = {4}, number = {8}, year = {1898}, language = {en}, url = {http://dml.mathdoc.fr/item/1183415280} }
Beman, W. W. Euler's use of $i$ to represent an imaginary. Bull. Amer. Math. Soc., Tome 4 (1898) no. 8, . http://gdmltest.u-ga.fr/item/1183415280/