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2. Y. Ota, “Handbook of Microbiology,” Vol. III, ed. by A. I. Laskin and H. A. Lechevalier, CRC Press, Inc., Cleveland, Ohio, 1973, p. 625.
3. P. Desnuelle, “The Enzymes,” Vol. 7, 3rd Ed., ed. by P. D. Boyer, Academic Press, New York, 1972, p. 575.
4. A. R. Macrae, “Microbial Enzymes and Biotechnology,” ed. by W. H. Forgarty, Appi. Sci. Publishers, New York, 1983, p. 225.