1. aWink, M. Modern Alkaloids: Structure, Isolation, Synthesis and Biology; Fattorusso, E.; Taglialatela-Scafati, O., Eds. Wiley-VCH: Weinheim, 2007; pp 1–24.
2. b Biochemistry of Plant Secondary Metabolism; Roberts, M. F.; Strack, D.; Wink, M., Eds. Sheffield Academic Press, 1999; pp 17–70.
3. Aniszewski, T. Alkaloids – Secrets of Life; Elsevier: Amsterdam, 2007; pp 1–315.
4. Tamariz, J.; Burgueño-Tapia, E.; Vásquez, M. A.; Delgado, F. The alkaloids: Chemistry and Biology; Knölker, H.J., Ed. Elsevier, 2018; Vol. 80, pp 1–314.
5. Biologically active indolizidine alkaloids