HASELEIN, W.; ECKHARD, D. Identification of a time-varying SIR Model for Covid-19. Trends in Computational and Applied Mathematics, [S. l.], v. 26, n. 1, p. e01818, 2025. DOI: 10.5540/tcam.2025.026.e01818. Disponível em: https://tcam.sbmac.org.br/tema/article/view/1818. Acesso em: 26 sep. 2025.