Rumende, C. M., E. C. Susanto, and T. P. Sitorus. “The Management of Pulmonary Fibrosis in COVID-19”. Acta Medica Indonesiana, vol. 53, no. 2, July 2021, p. 233, https://www.actamedindones.org/index.php/ijim/article/view/1826.