CHEN YAN; TIANZHI YAO. Global Big Challenge: The Mutant Novel Coronavirus New Stage. Global Journal of Science Frontier Research, [S. l.], v. 21, n. I1, p. 65–66, 2021. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/2900. Acesso em: 19 may. 2024.