KAPICIOĞLU, S., et al. “Endoscopic Balloon Dilation As Treatment of Gastric Outlet Obstruction Secondary Peptic Ulcer Disease”. Turkish Journal of Gastroenterology, vol. 3, no. 3, Jan. 1992, pp. 569-70, https://turkjgastroenterol.org/index.php/tjg/article/view/161.