@article{1183418885, author = {Carstens, R. L.}, title = {A definition of quaternions by independent postulates}, journal = {Bull. Amer. Math. Soc.}, volume = {13}, number = {3}, year = {1906}, pages = { 392-394}, language = {en}, url = {http://dml.mathdoc.fr/item/1183418885} }
Carstens, R. L. A definition of quaternions by independent postulates. Bull. Amer. Math. Soc., Tome 13 (1906) no. 3, pp. 392-394. http://gdmltest.u-ga.fr/item/1183418885/