ROCSOREANU, C.; STERPU, M. Homoclinic and Heteroclinic Orbits for a Liénard System. Journal of Informatics and Mathematical Sciences, [S. l.], v. 10, n. 4, p. 563–571, 2018. DOI: 10.26713/jims.v10i4.1048. Disponível em: http://rgnpublications.com/journals/index.php/jims/article/view/1048. Acesso em: 24 nov. 2024.