On Existence of Ground States for Some Elliptic Systems. Journal of Partial Differential Equations, [S. l.], v. 23, n. 4, p. 305–314, 2020. DOI: 10.4208/jpde.v23.n4.1. Disponível em: https://global-sci.com/index.php/jpde/article/view/4170. Acesso em: 5 dec. 2025.