VALDES, Juan E. Nápoles; BITTENCURT, Luciano M. Lugo Motta. A Note on Bounded Solutions of a Generalized Lienard Type System. American Scientific Research Journal for Engineering, Technology, and Sciences, Jordan, v. 17, n. 1, p. 89–94, 2016. Disponível em: https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/1155. Acesso em: 14 sep. 2025.