The Center Conditions and Hopf Cyclicity for a 3D Lotka-Volterra System. Journal of Nonlinear Modeling and Analysis, [S. l.], v. 3, n. 1, p. 1–12, 2024. DOI: 10.12150/jnma.2021.1. Disponível em: https://global-sci.com/index.php/jnma/article/view/13582. Acesso em: 5 dec. 2025.