JEBELEAN, P.; PAPAGEORGIOU, N. S. On noncoercive periodic systems with vector $p$-Laplacian. Topological Methods in Nonlinear Analysis, [S. l.], v. 38, n. 2, p. 249–263, 2011. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2011.031. Acesso em: 3 lip. 2024.