1. R. Spiro, “Methods in Enzymology,” Vol. VIII, ed. by E. F. Neufeld and V. Ginsburg, Academic Press Inc., New York, N. Y., 1966, p. 10.
2. A. Misaki, “Sôgô Tatôruikagaku,” Vol. I, ed. by T. Harada and T. Koizumi, Kodansha Co., Tokyo, Japan, 1973, p. 68.