On The Mathematical Model of Two- Prey and Two-Predator Species. Iraqi Journal of Science, [S. l.], v. 61, n. 3, p. 608–619, 2020. DOI: 10.24996/ijs.2020.61.3.17. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/1260.. Acesso em: 2 may. 2024.