Lie, K. C., S. Shakinah, A. Pasaribu, R. Sinto, and L. Nainggolan. “Observational Study on Secondary Bacterial Infection and the Use of Antibiotics in COVID-19 Patients Treated in a Tertiary Referral Hospital”. Acta Medica Indonesiana, vol. 54, no. 2, July 2022, p. 161, http://www.actamedindones.org/index.php/ijim/article/view/2075.