1. Diterpenes from the leaves of Croton zambesicus;Block;Phytochemistry,2004
2. Bruker, 2004. APEX2, XPREP and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.
3. Bruneton, J., 1995. Pharmacognosy, Phytochemistry, Medicinal Plants. Intercept Limited, Andover, UK.
4. Zulu Medicine and Medicine-Men;Bryant,1966
5. Antineoplastic constituents of some southern African plants;Charlson;J. Ethnopharmacol.,1980