1. “Methods in Carbohydrate Chemistry,” Vol. I, ed. R. L. Whistler and M. L. Wolfrom, Academic Press, New York and London, 1963, p. 386.
2. ibid., p. 5.
3. T. E. Timell, “Advan. Carbohydrate Chemistry,” Vol. 20, Academic Press Inc., New York, 1965, p. 409.
4. “Comparative Phytochemistry,” ed. T. Swain, Academic Press, London and New York, 1966, p. 137.