@article{1183504869, author = {Gage, Walter H.}, title = {An arithmetical identity for the form $ab - c^2$}, journal = {Bull. Amer. Math. Soc.}, volume = {48}, number = {12}, year = {1942}, pages = { 898-900}, language = {en}, url = {http://dml.mathdoc.fr/item/1183504869} }
Gage, Walter H. An arithmetical identity for the form $ab - c^2$. Bull. Amer. Math. Soc., Tome 48 (1942) no. 12, pp. 898-900. http://gdmltest.u-ga.fr/item/1183504869/