Existence of nontrivial solutions for Schrödinger-Poisson system with sign-changing potential. Letters on Applied and Pure Mathematics, [S. l.], v. 2, n. 1, 2025. DOI: 10.1234/dtmtqb58. Disponível em: https://lapmjournal.com/index.php/lapm/article/view/26. Acesso em: 4 apr. 2025.