ZHANG, Z.; YU, M.; ZHENG, X. Existence of nontrivial solutions to Schrödinger systems with linear and nonlinear couplings via Morse theory. Topological Methods in Nonlinear Analysis, [S. l.], v. 61, n. 2, p. 701–716, 2023. DOI: 10.12775/TMNA.2022.032. Disponível em: https://apcz.umk.pl/TMNA/article/view/44693. Acesso em: 3 jul. 2024.