ESCOBAR PÉREZ, Billy. La esperanza es nuestro principal acicate. Hojas Universitarias, [S. l.], n. 50, p. 184–186, 2017. Disponível em: https://editorial.ucentral.edu.co/ojs_uc/index.php/hojasUniv/article/view/1317. Acesso em: 23 jul. 2024.