1. 1) T. Imanaka; “Great development of the application of microorganisms (Biseibutsuriyou no daitenkai),” NTS, Tokyo, 2002, p. 495.
2. 2) K. D. Bruce, P. Strike, D. A. Ritchie; “Environmental Monitoring of Bacteria” C. Edwards ed., Humana Press, Totowa, 1999, p. 97.
3. 3) C. L. Meaysa, K. Broersmab, R. Nordina, A. Mazumder; Source tracking fecal bacteria in water; a critical review of current methods. J. Environ. Manag., 73, 71-79 (2004).
4. 4) The Ministry of Health, Labour and Welfare, Japan; “Standard methods of analysis in food safety regulation, part of microorganism (Shokuhin Eisei Kensa Shishin, Biseibutsu-hen)”, Japan Food Hygiene Association, Tokyo, 2004, p. 71.
5. 5) Japan Society for Food Engineering; “Food Engineering Handbook (Shokuhin Kougaku Handbook)”, Asakura Publishing, Tokyo, 2006, p. 564.