1. El-Saied, H. M.: M. Sc. Faculty of Agriculture, Cairo University (1963).
2. Gambhir, I. R., S. Dutt: Indian Soap J.16, 13 (1950).
3. Rawlings, H. W., U. H. Kuhrt, J. G. Baxter: J. Amer. Oil Chemists Soc.25, 24 (1948).
4. Hassan, A., M. I. El-Ghamry, and S. M. A. D. Zayed: Naturwiss.51, 409 (1964).
5. Cantarow, A., and B. Schepartz, 4th Ed. (Toppan Co. Ltd. Tokyo, Japan 1967).