Generalization of the concept of an attractor for pendulum systems with limited excitation. Neliniini Kolyvannya, [S. l.], v. 24, n. 4, p. 473–481, 2021. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1046. Acesso em: 21 jan. 2026.