1. V.A. Moshkin, editor. Castor Amerind, New Delhi, 1986.
2. E.A. Weiss, Oilseed crops. 2nd ed. Blackwell Science, Oxford. (2000) pp 350–365.
3. E.A Weiss, In; Weiss EA (ed) Oilseed crops. Longman Group Ltd, London, (1983) pp. 31–99.
4. Research Note (PH—Postharvest Technology)
5. B.Z. Salihu, A.K. Gana, A. Amosun, A. Shaahu, S.A. Agboire, B.O. Apuyor and A. Oliseh, Morphological Characterization of Castor (Ricinus communis L.) Accessions. Proc. Agricultural Society of Nigeria. (2013). pp. 308–316.