1. Anonymus http://en.wikipedia.org/wiki/Castor_oil_plant
2. Anonymus http://wikipedia.org/wiki/Wunderbaum
3. Biochemical changes during the fermentation of castor oil (Ricinus communis) seeds for use as a seasoning agent;Anosike;Qual. Plant,1981
4. Betschart , A. A. Lyon , C. K. Kohler , G. O. 1975 Sunflower, safflower, sesame and castor protein. In: Pirie, N. W. (Ed.): Food Protein Sources. Cambridge University Press, New York, 79-104