Darboux Integrability of a Generalized 3D Chaotic Sprott ET9 System. Baghdad Science Journal, Iraq, Baghdad, v. 19, n. 3, p. 0542, 2022. DOI: 10.21123/bsj.2022.19.3.0542. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/4474.. Acesso em: 3 may. 2024.