BAYAN, Kadim, et al. “Pyloric Giant Brunner’s Gland Hamartoma As a Cause of Both Duodenojejunal Intussusception and Obscure Gastrointestinal Bleeding”. Turkish Journal of Gastroenterology, vol. 20, no. 1, Jan. 2009, pp. 52-56, https://www.turkjgastroenterol.org/index.php/tjg/article/view/1690.