E. Sawitri, L. P. Kalalo, and M. A. A. Ramadhan, “Prognostic Biomarkers in COVID-19: The Impact of Neutrophil-Lymphocyte Ratio, Ferritin, Platelet-Lymphocyte Ratio, and D-Dimer”, biochemmed, vol. 14, pp. 17–23, Apr. 2026.