MOĞULTEKİN, Nilgün. “UPPER AND LOWER GASTROINTESTINAL SYSTEM BLEEDINS”. Turkish Journal of Gastroenterology 3, no. 2 (January 2, 1992): 435–440. Accessed January 1, 2026. https://turkjgastroenterol.org/index.php/tjg/article/view/86.