SILVA, Luis; SOUSA RAMOS, José. Two-parameter families of discontinuous one-dimensional maps. Annales Mathematicae Silesianae, [S. l.], v. 13, p. 257–270, 1999. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/14154. Acesso em: 5 dec. 2025.