BAYRAKTAR, Yusuf, et al. “Percutenous Endoscopic Gastrostomy in Patients With Complete Dysphagia Due to Neurologic Disorders”. Turkish Journal of Gastroenterology, vol. 4, no. 4, Jan. 1993, pp. 664-7, https://www.turkjgastroenterol.org/index.php/tjg/article/view/357.