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3. J. E. Hodge and E. G. Inglett, “Sweeteners”, ed. by G. E. Inglett, The Avi-Publishing Co., West-port, Connecticut, 1974, pp. 216 ~ 237.
4. Y. Ariyoshi, Kagaku Sosetsu No. 14, “Chemistry of Taste and Smell,” ed. by I. Chibata, Gakkai Shuppan Center, 1976, pp. 85 ~ 128.
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