1. V. Pollak, J. Chromatgr.152, 201 (1978).
2. S. Ebel undJ. Hocke, J. Anal. Chem.294, 16 (1979).
3. V. Pollak, Densitometry in Thin-layer Chromatography, New York, Chichester, Brisbane, Toronto: John Wiley and Sons 1979.
4. P. Kubelka undF. Munk, Z. Techn. Phys.12, 593 (1931).
5. P. Kubelka undF. Munk, J. Opt. Soc. Amer.38, 448, 1067 (1948).