1. R.H. Thomson, “Naturally Occurring Quinones,” 2nd ed., Academic Press Inc., London, 1971, pp. 173~177.
2. F. L. Crane and R. Barr, “Methods in Enzymology,” Vol. 18C ed. by D. B. McCormick and L. D. Wright, Academic Press Inc., New York, 1971, pp. 149–150.