On a System of Linear Singular Partial Differential Equations with Weight Functions. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 12, n. 3, p. 1297–1314, 2019. DOI: 10.29020/nybg.ejpam.v12i3.3498. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3498. Acesso em: 21 nov. 2024.