1. T. Tomiyama, “Kosokagakukogyo Zenshu,” Vol. 17, ed. by T. Takahashi and T. Tadokoro, “Jiryo,” Koseikaku, Tokyo, 1925, pp. 45–55.
2. Official Methods of Analysis of the Association of Official Analytical Chemists (AOAC), ed. by S. Williams, 14th Ed., Association of Official Analytical Chemists, Inc., Virginia, U.S.A., 1984, pp. 431–988.
3. J. E. Hodge and Hofreiter, “Methods in Carbohydrate Chemistry,” Vol. 1, ed. by R. L. Whistler and M. L. Wolfrom, Academic Press, New York and London, 1962, pp. 388–389.
4. R. Ferrando, FAO Food and Nutrition Series No.2, Food and Agriculture Organization of the United Nations, Rome, 1981, p. 62.