ARCHDEACON, D. A picture is worth a thousand words: topological graph theory. CUBO, A Mathematical Journal, [S. l.], v. 5, n. 1, p. 101–112, 2003. Disponível em: https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1710. Acesso em: 19 may. 2024.