SEIXAS, José Adonai P. On Bases of Constant Curvature. CUBO, A Mathematical Journal, [S. l.], v. 4, n. 1, p. 167–173, 2002. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1729. Acesso em: 13 oct. 2025.