DANCER, E. N. Some results for jumping nonlinearities. Topological Methods in Nonlinear Analysis, [S. l.], v. 19, n. 2, p. 221–235, 2002. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2002.011. Acesso em: 22 lip. 2024.