1. J. J. Kirkland, J. Chromatogra. Sci.9, 206 (1971).
2. G. A. Horvard, A. J. P. Martin, Biochem. J.46, 215 (1951).
3. R. E. Majors, LC&GC Magazine6, 298 (1988).
4. Cs. Horvath, W. Melander, in:Cs. Hovarth, ed., High Performance Liquid Chromatography, Vol. 2, Academic Press, New York 1980.
5. H. Engelhardt, B. Dreyer, H. Schmidt, Chromatographia16, 11 (1982).