1. G. Embden and K. Baldes, Über den Abbau des Phenylalanins in Tierischen Organismus, Biochim. Z. 55:301–322 (1913).
2. S. Kaufman, The Structure of the Phenylalanine-Hydroxylation Cofactor. Proc. Natl. Acad. Sci. USA 50:1085–1093 (1963).
3. S. Kaufman, Studies on the Structure of the Primary Oxidation Product Formed from Tetrahydropteridines during Phenylalanine Hydroxylation, J. Biol. Chem. 239:332–338 (1964).
4. R.G.H. Cotton, Inborn errors of pterin metabolism, in “Folates and Pterins”, Vol.3 R.L. Blakley and V.M. Whitehead, eds. Wiley & Sons, New York, (1986).
5. S. Kaufman and D.B. Fisher, Pterin-requiring aromatic amino acid hydroxylases, in Molecular Mechanisms of Oxygen Activation, O. Hayaishi, ed., Academic Press, New York, (1974).