1. Ameyama, M., & Ohtsuka, S. (1990). Science of vinegar. Tokyo: Asakura-Shoten (in Japanese).
2. Ashiuchi, M., Soda, K., & Misono, H. (1999). A poly-γ-glutamate synthetic system of Bacillus subtilis IFO 3336: Gene cloning and biochemical analysis of poly-γ-glutamate produced by Escherichia coli clone cells. Biochemical and Biophysical Research Communications, 263, 6–12.
3. Brewing Society of Japan. (1991). Manufacturing technology of Honkaku Shochu (pp. 28–29). Tokyo: Brewing Society of Japan. in Japanese.
4. Brewing Society of Japan. (2006). The national microbe of Japan. http://www.jozo.or.jp/koujikinnituite2.pdf . Accessed 31 Mar 2015 (in Japanese).
5. Dicks, L. M. T., Holzapfel, W. H., Satomi, M., Kimura, B., & Fujii, T. (2009). Genus Tetragenococcus. In P. Vos, G. Garrity, D. Jones, N. R. Krieg, W. Ludwig, F. A. Rainey, K.-H. Schleifer, & W. Whitman (Eds.), Bergey’s manual of systematic bacteriology (Vol. 3, pp. 611–616). New York: Springer.