STANKEWITZ, R.; SUGAWA, T.; SUMI, H. Some counterexamples in dynamics of rational semigroups. Annales Fennici Mathematici, [S. l.], v. 29, n. 2, p. 357–366, 2004. Disponível em: https://afm.journal.fi/article/view/135111. Acesso em: 25 nov. 2024.