1. L. R. Snyder, J. J. Kirkland, Introduction to Modem Liquid Chromatography (2nd Edition, 1979), J. Wiley & Sons Inc., New York, USA.
2. F. McLennan, ICI Ltd. (Organics Division) Hexagon House, Blackley, Manchester, Private Communication, 1981.
3. J. L. DiCesare, M. W. Dong, J. R. Gant, Chromatogrphia15, 595 (1982).