Mulato-Briones, Irma Berenice, et al. “Comparative Genomic Analysis: From SARS to SARS CoV 2 Virus-Types. Similarities and Differences”. Revista Médica Del Instituto Mexicano Del Seguro Social, vol. 58, no. Supl 2, Oct. 2021, pp. S121-133, https://revistamedica.imss.gob.mx/index.php/revista_medica/article/view/3688.