1. in ‘The Monoterpenoid Indole Alkaloids’, Ed. J. E. Saxton, Wiley-Interscience, Chichester, 1983;
2. in ‘The Monoterpenoid Indole Alkaloids’, Ed. J. E. Saxton, John Wiley & Sons, Chichester, 1994, Chapt. 10.
3. , ‘Dictionary of Alkaloids’, Chapman and Hall, London, 1989;
4. ‘Hagers Handbuch der Pharmazeutischen Praxis’, Vol. 6, Springer Verlag, Berlin, 1994;
5. ‘Giftpflanzen – Pflanzengifte’, Ecomed, München, 1994;