Lubis, Masrul, and Lukman Hakim Zain. “Etiology Profile of Lower Gastrointestinal Bleeding”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy 13, no. 2 (January 8, 2012): 94–96. Accessed October 2, 2026. https://www.ina-jghe.com/index.php/jghe/article/view/363.