@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/