CANDELA, A. M.; SPORTELLI, C. Nontrivial solutions for a class of gradient-type quasilinear elliptic systems. Topological Methods in Nonlinear Analysis, [S. l.], v. 59, n. 2B, p. 957–986, 2022. DOI: 10.12775/TMNA.2021.047. Disponível em: https://apcz.umk.pl/TMNA/article/view/38709. Acesso em: 26 apr. 2024.