LJUNGGREN, W. On the Diophantine Equation $Cx^2 + D = 2y^n$. MATHEMATICA SCANDINAVICA, [S. l.], v. 18, p. 69–86, 1966. DOI: 10.7146/math.scand.a-10781. Disponível em: https://www.mscand.dk/article/view/10781. Acesso em: 7 may. 2024.