1. The Stone-tipped Arrow. Late Stone Age Hunters of the Tropical Old World;Allchin,1966
2. Middle Stone Age bone tools from the Howiesons Poort layers, Sibudu Cave, South Africa;Backwell;Journal of Archaeological Science,2008
3. Die Glykoside von Acokanthera longiflora;Bally;Helvetica Chimica Acta,1951
4. Farmacognosia;Biagi,1988
5. Chemical studies on the alkaloids of Asian and African Strychnos species;Bisset;Lloydia,1972