The Existence of Weak Solutions of a Higher Order Nonlinear Eilliptic Equation. Communications in Mathematical Research, [S. l.], v. 35, n. 4, p. 340–344, 2019. DOI: 10.13447/j.1674-5647.2019.04.05. Disponível em: https://global-sci.com/index.php/cmr/article/view/9014. Acesso em: 5 dec. 2025.