1. B. Hagihara, T. Yonetani, T. Yamamoto and T. Komaki, “Koso Kenkyuhô,” Vol. II, ed. by S. Akabori, Asakura Shoten Co., Ltd., 1968, p. 242.
2. “Bergey’s Manual of Determinative Bacteriology,” 8th Ed., ed. by S. T. Cowan, J. G. Holt, J. Liston, R. G. E. Murray, C. F. Niven, A. W, Ravin and R. Y. Stanier, Williams and Wilkins Co. 1974.