Orhan SEZGİN, et al. “Endoscopic Sphincteroplasty: An Effective Method of Extracting Bile Duct Stones by ERCP Patients With Billroth II Gastrectomy”. Turkish Journal of Gastroenterology, vol. 10, no. 1, July 2019, pp. 78-80, https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/1547.