DEMİR, Ali, et al. “THE EVALUTION OF 2590 UPPER GASTROINTESTINAL ENDOSCOPY WERE PERFORMED IN FIRAT UNIVERCITY HOSPITAL IN THE LAST FIVE YEARS”. Turkish Journal of Gastroenterology, vol. 4, no. 1, Apr. 2020, pp. 99-101, https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/158.