BI´S, Andrzej; URBA´NSKI, Mariusz. Some remarks on topological entropy of a semigroup of continuous maps. CUBO, A Mathematical Journal, [S. l.], v. 8, n. 2, p. 63–71, 2006. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1605. Acesso em: 12 oct. 2025.