Le, Maohua. β€œOn 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 July 24, 2026. https://journals.msp.org/mscand/article/view/764.