CUCINOTTA, Domenico; VANELLI, Maurizio. WHO Declares COVID-19 a Pandemic. Acta Biomedica Atenei Parmensis, Fidenza, Italy, v. 91, n. 1, p. 157–160, 2020. DOI: 10.23750/abm.v91i1.9397. Disponível em: https://mattioli1885journals.com/index.php/actabiomedica/article/view/9397. Acesso em: 6 apr. 2025.