A Remark on the Existence of Positive Solution for a Class of (p,q)-Laplacian Nonlinear System with Multiple Parameters and Sign-changing Weight. Journal of Partial Differential Equations, [S. l.], v. 26, n. 2, p. 99–106, 2013. DOI: 10.4208/jpde.v26.n2.1. Disponível em: https://www.global-sci.com/index.php/jpde/article/view/14851. Acesso em: 5 dec. 2025.