1. K. Sakata and K. Ina, Proceedings of the International Symposium on Tea Quality-Human Health, Hangzhou, China, 1987, p. 132.
2. R. Schaffer, in “The Carbohydrates, Chemistry and Biochemistry,” 2nd Ed., Vol. IA, ed. by W. Pigman and D. Horton, Academic Press, New York, 1972, p. 105.
3. K. Sakata, S. Kawai, A. Yagi and K. Ina, Abstract of Papers, Annual Meeting of the Japanese Society for Food Science and Technology, Sendai, 1989, p. 60.