ESPARZA, D. J.; NITSCHE, A.; DAMASO, C. R. Investigations on the historical origin and evolution of the smallpox vaccine. Gaceta Médica de Caracas, [S. l.], v. 128, n. 1S, p. S88-S97, 2020. Disponível em: http://saber.ucv.ve/ojs/index.php/rev_gmc/article/view/20443. Acesso em: 25 dic. 2024.