CHE, G.; WU, T.- fang. Three positive solutions for the indefinite fractional Schrödinger-Poisson systems. Topological Methods in Nonlinear Analysis, [S. l.], v. 62, n. 1, p. 53–81, 2023. DOI: 10.12775/TMNA.2022.046. Disponível em: https://apcz.umk.pl/TMNA/article/view/46305. Acesso em: 3 lip. 2024.