A System-Optimization Model for Multiclass Human Migration with Migration Costs and Regulations Inspired by the Covid-19 Pandemic. Minimax Theory and its Applications, [S. l.], v. 6, n. 2, p. 281–294, 2021. Disponível em: https://journalmta.com/index.php/jmta/article/view/115. Acesso em: 30 jun. 2026.