Nohu, Mohammad Gilang Fajriansyah, et al. “Comparison of SpO2 FiO2 Ratio and PAO2 FIO2 Ratio As Initial Assessment in Patients at Risk of Respiratory Failure”. Acta Biomedica Atenei Parmensis, vol. 96, no. 3, June 2025, p. 16567, https://doi.org/10.23750/abm.v96i3.16567.