1. Bothe, H. and Cammenga, N. K., Proc. 9th Coll. ASIC, 1980, 135–44.
2. Seidell, A. and Linke, W. F., Solubility of Organic Compounds, Vol. 2, Supplement, 3rd edn, Van Nostrand, New York, 1951, 610–13.
3. Stephen, H. and Stephen, T., Solubilities ofInorganic and Organic Compounds, Part 1, Pergamon, Oxford, 1963, Table 6227.
4. Sivetz, M. and Desrosier, N. W., Coffee Technology, AVI Publishing Co., Westport, Conn., 1979, 620.
5. Maier, H. G., Kaffee, Paul Parey, Berlin, 1981, 35–6.