FEDORENKO, V. V. Asymptotic periodicity of trajectories of an interval. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 61, n. 5, p. 716–720, 2009. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3054. Acesso em: 5 dec. 2025.