SELÇUK, Haldun, Fatih BOYVAT, Serdar EREN, Murat KORKMAZ, Gürden GÜR, Uğur YILMAZ, and Sedat BOYACIOĞLU. 2004. “Duodenal Varices As an Unusual Cause of Gastrointestinal Bleeding Due to Portal Hypertension: A Case Report”. Turkish Journal of Gastroenterology 15 (2):104-7. https://turkjgastroenterol.org/index.php/tjg/article/view/1359.