Non-linear models applicable to mortality and cases of COVID-19 in Brazil, Italy and the world. Research, Society and Development, [S. l.], v. 9, n. 6, p. e117963561, 2020. DOI: 10.33448/rsd-v9i6.3561. Disponível em: https://www.rsdjournal.org/rsd/article/view/3561. Acesso em: 5 dec. 2025.