1. D. Waldi, Chromatography of alkaloids, inA. T. James andL. J. Morris, New biochemical separations, p. 157–196, London, Van Nostrand, 1964.
2. F. Santavy, Thin-layer chromatography of alkaloids, inE. Stahl, Thin-layer chromatography, p. 421–471. Berlin, Springer-Verlag, 1969.
3. R.L. Munier, Chromatographie des bases azotées (alcaloides, amines, vitamines) et des acides organiques hydrosolubles, Bull. Soc. Chim. France, 853–873 (1952).
4. D. Waldi, K. Schnackerg andF. Munter, J. Chromatogr.6, 61 (1961).
5. K. Teichert, E. Mutschler andH. Rochelmeyer, Z. anal. Chem.181, 325 (1961).