Monomial Derivations Without Darboux Polynomials. Communications in Mathematical Research, [S. l.], v. 33, n. 2, p. 185–192, 2019. DOI: 10.13447/j.1674-5647.2017.02.10. Disponível em: https://global-sci.com/index.php/cmr/article/view/8926. Acesso em: 5 dec. 2025.