GONZÁLEZ AGUILERA, Victor. On a pencil of ð˜’â‚ƒ surfaces. CUBO, A Mathematical Journal, [S. l.], n. 8, p. 21–23, 1992. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1565. Acesso em: 12 oct. 2025.