KONG, F.; NIETO, J. J. Impact of discontinuous treatments on the generalized epidemic model. Topological Methods in Nonlinear Analysis, [S. l.], v. 56, n. 1, p. 349–378, 2020. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2020.018. Acesso em: 22 jul. 2024.