LJUNGGREN, W. On the Diophantine Equation $Cx^2 + D = 2y^n$. Mathematica Scandinavica, Berkeley, CA, United States, v. 18, p. 69–86, 1966. DOI: 10.7146/math.scand.a-10781. Disponível em: https://journals.msp.org/mscand/article/view/2517. Acesso em: 25 jul. 2026.