HUGHES, Barnabas. The companion curves of gilles personne de roberval. CUBO, A Mathematical Journal, [S. l.], v. 4, n. 2, p. 41–55, 2002. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1782. Acesso em: 12 oct. 2025.