SHARKOVSKY, O. M. Coexistence of cycles of а continuous mapping of the line into itself. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 76, n. 1, p. 5–16, 2024. DOI: 10.3842/umzh.v76i1.8026. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8026. Acesso em: 7 apr. 2025.