Farag, R. S., M. N. A. Hassan, and H. F. M. Ali. “Bees Wax and Its Unsaponifiables As Natural Preservative for Butter and Cottonseed Oils”. Grasas y Aceites 44, no. 3 (June 30, 1993): 183–189. Accessed May 6, 2024. https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1091.