S. Yriberry Ureña, F. Salazar Muente, J. A. Barriga Briceño, A. Vera Calderón, and D. Suárez Arellano, “Difficult or Complex Bile duct stones in ERCP: Large Balloon Dilation and other stone management methods. Accumulated experience in a referral Endoscopic Center 2009- 2018”, Rev Gastroenterol Peru, vol. 41, no. 2, pp. 94–102, Jun. 2021.