1. K. Yamada, Y. Minoda, T. Kodama and U. Kotera, “Fermentation Advances,” Academic Press Inc., New York, N. Y., 1969 p. 541; K. Yamada, T. Kodama, T. Obata and N. Takahashi,J. Ferment, Technol.49, 85 (1971).
2. R. L. Shriner, R. C. Fuson and D. Y. Curtin, “The Systematic Identification of Organic Compounds,” John Wiley & Sons, Ink., New York, 1956, p. 219.
3. C. H. Hassall, “Organic Reaction,” John Wiley & Sons Inc., New York,9, 73 (1957).