Jirschitzka, J., Schmidt, G.W., Reichelt, M., Schneider, B., Gershenzon, J. and D'Auria, J.C. (2012). „Plant tropane alkaloid biosynthesis evolved independently in the Solanaceae and Erythroxylaceae”. Proc. Natl. Acad. Sci. USA109: 10304-10309. PMID22665766.