Autonomous Planar Systems of Riccati Type. Journal of Nonlinear Modeling and Analysis, [S. l.], v. 4, n. 2, p. 171–197, 2024. DOI: 10.12150/jnma.2022.171. Disponível em: https://global-sci.com/index.php/jnma/article/view/13635. Acesso em: 6 dec. 2025.