HEMER, Ove. On some diophantine equations of the type $y^2 - f^2 = x^3$. Mathematica Scandinavica, Berkeley, CA, United States, v. 4, p. 95–107, 1956. DOI: 10.7146/math.scand.a-10458. Disponível em: https://journals.msp.org/mscand/article/view/2868. Acesso em: 25 jul. 2026.