SHIVAJI, R.; SON, B. Bifurcation and multiplicity results for classes of $p,q$-Laplacian systems. Topological Methods in Nonlinear Analysis, [S. l.], v. 48, n. 1, p. 103–114, 2016. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2016.036. Acesso em: 3 jul. 2024.