VARGHESE, V.; BHOYAR, S.; NISAR, K. S. Analysis of Fractional-Order Model of COVID-19 Pandemics With a Nonlinear Incidence Rate. Innovative Biosystems and Bioengineering, [S. l.], v. 4, n. 3, p. 160–167, 2020. DOI: 10.20535/ibb.2020.4.3.206271. Disponível em: http://ibb.kpi.ua/article/view/206271. Acesso em: 28 mar. 2024.