1. C. H. Barrows, Jr., and B. F. Chow, in “Protein and Amino Acid Nutrition,” ed. by A. A. Albanese, Academic Press, New York, 1959, pp. 119~130.
2. J. B. Allison, in “Mammalian Protein Metabolism,” Vol. 2, ed. by H. N. Munro and J. B. Allison, Academic Press, New York, 1964, pp. 74~75.