Muzellina, V. N., Andarini, L. and Syam, A. F. (2026) “Etiology of Upper Gastrointestinal Bleeding: A Five-Year Study at a Tertiary Hospital”, The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, 27(1), pp. 3–9. doi: 10.24871/27120263-9.