TAŞKIN, Vildan, et al. “The Effect of Duodenogastric Reflux on Helicobacter Pylori Presence and Gastric Histopathologic Changes”. Turkish Journal of Gastroenterology, vol. 14, no. 4, Jan. 2003, pp. 239-42, https://turkjgastroenterol.org/index.php/tjg/article/view/1279.