Maximum Principle for Nonlinear Cooperative Elliptic Systems on RN. Journal of Partial Differential Equations, [S. l.], v. 24, n. 3, p. 264–280, 2011. DOI: 10.4208/jpde.v24.n3.3. Disponível em: https://www.global-sci.com/index.php/jpde/article/view/4192. Acesso em: 5 dec. 2025.