Veronesi, Licia, Maria Eugenia Colucci, Cesira Pasquarella, Luca Caruso, Mostafa Mohieldin Mahgoub Ibrahim, Roberta Zoni, Massimiliano Pergreffi, 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 91, no. 9-S (July 20, 2020): 19–21. Accessed October 18, 2025. https://mail.mattioli1885journals.com/index.php/actabiomedica/article/view/10138.