VILLENA, A. J. Vacunas contra la COVID-19. Ambiociencias, [S. l.], n. 19, p. 75–108, 2021. DOI: 10.18002/ambioc.i19.7332. Disponível em: https://revistas.unileon.es/index.php/ambioc/article/view/7332. Acesso em: 1 oct. 2022.