Chow, Pietranico, and Mukerji. (1975) 1975. “Studies of Oxygen Binding Energy to Hemoglobin Molecule”. Biochem Biophys Res Commun 66 (4): 1424-31. doi:10.1016/0006-291x(75)90518-5.

Garner, and Behal. (1975) 1975. “Effect of PH on Substrate and Inhibitor Kinetic Constants of Human Liver Alanine Aminopeptidase. Evidence for Two Ionizable Active Center Groups”. Biochemistry 14 (23): 5084-8. doi:10.1021/bi00694a009.