1. R. Hayashi, T. Masuda, I. Miyamoto and T. Hata, in the Proceeding of the First International Congress of the International Association of Microbiological Societies, Tokyo, September 1~7, 1974 (in press).
2. H. Wüst, “Methods of Enzymatic Analysis,” ed. by H. Bergmayer, p. 824, 1963.