A mathematical model for the study and analysis of the dynamics of COVID-19 in Colombia. Orinoquia, [S. l.], v. 25, n. 1, p. 65–76, 2021. DOI: 10.22579/20112629.687. Disponível em: https://ojs-orinoquia-prueba.metarevistas.org/index.php/orinoquia/article/view/687. Acesso em: 14 sep. 2026.