1. Ministry of Forests;PN Suwal,1970
2. Alvaro Viera, R. Subsidio Para o Estudo Da Flora Medicinal Da Guinea Portuguesa. Agencia-Geral Do Ultramar, Lisboa, 1959.
3. Malhi, B. S. and V. P. Trivedi. Vegetable antifertility drugs of India. Q J Crude Drug Res 1972; 12: 19–22.
4. Willaman, J. J. and H. L. Li. Alkaloidbearing plants and their contained alkaloids, Lloydia 1970; 33S: 1–286.
5. Wei, C. H., F. C. Hartman, P. Pfuderer and W. K. Yang. Purification and characterization of two major toxic proteins from the seeds of Abrus precatorius. J Biol Chem 1974; 249: 3061–3067.