1. H. N. Munro, “Mammalian Protein Metabolism,” Vol. IV, ed. by H. N. Munro, Academic Press, New York and London, 1970, p. 101.
2. D. M. Greenberg, “Metabolic Pathways,” Vol. II, ed. by D. M. Greenberg, Academic Press, New York and London, 1961, p. 79.
3. Q. R. Rogers and A. E. Harper, “Protein Nutrition and Free Amino Acid Patterns,” ed. by J. H. Leathem, Rutgers University Press, New Jersey, 1968, p. 107.
4. A. Neuberger and F. F. Richards, “Mammalian Protein Metabolism,” Vol. I, ed. by H. N. Munro and J. B. Allison, Academic Press, New York and London, 1964, p. 243