VERONESI, Licia et al. Virological surveillance of SARS-CoV-2 in an Italian northern area: comparison of Real Time RT PCR cycle threshold (Ct) values in three epidemic periods. Acta Biomedica Atenei Parmensis, Fidenza, Italy, v. 91, n. 9-S, p. 19–21, 2020. DOI: 10.23750/abm.v91i9-S.10138. Disponível em: https://mattioli1885journals.com/index.php/actabiomedica/article/view/10138. Acesso em: 5 jul. 2025.