1. In Tea Manufacture in Ceylon De La Salle Press, Colombo. 1965, 3rd edition, p. 99.
2. Changes in the cell wall of the pear during ripening
3. ; In Methods in Carbohydrate Chemistry Vol. 4 ( ed.) Academic Press, New York and London. 1964, p. 33.
4. ; Chemy Ind. 1971, 577.