RICARDO REYES CAROCCA. Coexistence of limit cycles and invariant curves for Extended Kukles systems. Scientia Series A: Mathematical Sciences, [S. l.], v. 25, p. 37–45, 2025. DOI: 10.71712/. Disponível em: https://revistas.usm.cl/scientia/article/view/218.. Acesso em: 19 aug. 2025.