García Sánchez, J. E., E. García Sánchez, and M. L. Merino Marcos. “Infectious Diseases: Smallpox (variola Major)”. Journal of Medicine and Movies, vol. 2, no. 3, July 2008, pp. 115-21, https://revistas.usal.es/cinco/index.php/medicina_y_cine/article/view/179.