Le, Maohua. “On the Diophantine System $x^2 - Dy^2 = 1-D$ and $x=2z^2-1$”. MATHEMATICA SCANDINAVICA 95, no. 2 (December 1, 2004): 171–180. Accessed April 10, 2025. https://www.mscand.dk/article/view/14455.