Feldman, MD, M., and D. Rebel, BS, RRT. “Beyond PaO2: Relationships Between Indices of Pulmonary Oxygen Transfer in Hospitalized Adults Undergoing Blood Gas Testing”. International Journal of Innovative Research in Medical Science, Vol. 4, no. 03, Mar. 2019, p. 205 to 209, doi:10.23958/ijirms/vol04-i03/600.