Developing Optimal Policies to Fight Pandemics and COVID-19 Combat in the United States. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 13, n. 2, p. 369–389, 2020. DOI: 10.29020/nybg.ejpam.v13i2.3700. Disponível em: https://ejpam.com/index.php/ejpam/article/view/3700.. Acesso em: 4 may. 2024.