Gürhan Şişman, et al. “Endoscopic Treatment of Heterotopic Pancreas Localized in the Duodenum”. Turkish Journal of Gastroenterology, vol. 25, no. 2, July 2019, pp. 216-7, https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/2939.