FENG, M. A class of singular $k_i$-Hessian systems. Topological Methods in Nonlinear Analysis, [S. l.], v. 62, n. 1, p. 341–365, 2023. DOI: 10.12775/TMNA.2022.072. Disponível em: https://apcz.umk.pl/TMNA/article/view/46315. Acesso em: 22 jul. 2024.