Al-Khattabi, H. A. Z., A. A. Ali, H. H. Al-jameel, and A. M. Al-Ameri. “Elastic Band Ligation of Hemorrhoids Using flexible Gastroscope”. Journal of Contemporary Medical Sciences, vol. 3, no. 9, Mar. 2017, pp. 167-9, https://www.jocms.org/index.php/jcms/article/view/131.