KOTAN, Çetin, et al. “Carcinoid Tumor of the Stomach A Rare Form of Gastrointestinal Carcinoid Tumor: A Report on Three Cases*”. Turkish Journal of Gastroenterology, vol. 12, no. 4, Jan. 2001, pp. 303-7, https://turkjgastroenterol.org/index.php/tjg/article/view/1173.