COHN, J. H. E. The Diophantine equation $y^2=Dx^4+1$, III. MATHEMATICA SCANDINAVICA, [S. l.], v. 42, p. 180–188, 1978. DOI: 10.7146/math.scand.a-11746. Disponível em: https://www.mscand.dk/article/view/11746. Acesso em: 14 apr. 2025.