1. Zlatkis, A. and Kaiser, R.E., HPTLC-High Performance Thin Layer Chromatography, Amsterdam: Elservier, 1977, p. 240.
2. Stahl, E., J. Chromatogr., A, 1979, vol. 165, p. 59.
3. Berezkin, V.G. and Bochkov, A.S., Kolichestvennaya tonkosloinaya khromatografiya (Quantitative Thin-Layer Chromatography), Moscow: Nauka, 1980, p. 184.
4. Guiochon, G. and Siouffi, A.M., J. Chromatogr., A, 1982, vol. 245, p. 1.
5. Geiss, F., Fundamentals of Thin Layer Chromatography, Heiderberg: Huttig, 1987, vol. 1, p. 278.