First Integrals and a Zero-Hopf Bifurcation of the Four-Dimensional Lotka-Volterra Systems. Iraqi Journal of Science, [S. l.], v. 65, n. 9, p. 5171–5181, 2024. DOI: 10.24996/ijs.2024.65.9.31. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/10325.. Acesso em: 3 oct. 2024.