Malka Eldar Elmahy Hamid Babker, A E F Osman, Neda, S.E.adam. “The Antibacterial Effect of Olive Leaf in Sudan”. International Journal of Emerging Trends in Science and Technology, Vol. 4, no. 11, Nov. 2017, pp. 6356-60, http://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1198.