TIAN, Y.; GRAEF, J. R.; KONG, L.; WANG, M. Three solutions for second-order impulsive differential inclusions with Sturm-Liouville boundary conditions via nonsmooth critical point theory. Topological Methods in Nonlinear Analysis, [S. l.], v. 47, n. 1, p. 1–18, 2016. DOI: 10.12775/TMNA.2015.089. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2015.089. Acesso em: 22 jul. 2024.