BAĞATUR, Nevin, et al. “Evaluation of Chronic Gastritis in Patients With Helicobacter Pylori Associated Gastritis, Gastroduodenitis and Duodenal Ulcer Disease”. Turkish Journal of Gastroenterology, vol. 10, no. 1, Jan. 1999, pp. 32-35, https://turkjgastroenterol.org/index.php/tjg/article/view/945.