COHN, J. H. E. Five Diophantine Equations. MATHEMATICA SCANDINAVICA, [S. l.], v. 21, p. 61–70, 1967. DOI: 10.7146/math.scand.a-10845. Disponível em: https://tidsskrift.dk/math/article/view/10845. Acesso em: 14 aug. 2026.