HUSSAIN, A.; AHMED, I.; YUSUF, A.; IBRAHIM, M. J. EXISTENCE AND STABILITY ANALYSIS OF A FRACTIONAL-ORDER COVID-19 MODEL. Bangmod International Journal of Mathematical and Computational Science, Bangkok, Thailand, v. 7, p. 102–125, 2021. Disponível em: https://bangmodjmcs.com/index.php/bangmodmcs/article/view/30. Acesso em: 22 nov. 2024.