Cracking Difficult Biliary Stones
Clinical Endoscopy. 2021;54(5):660-668 
Clinical Practice Guidelines for Common Bile Duct Stones: The Endoscopic Management of Difficult and Recurrent Common Bile Duct Stones
The Korean Journal of Pancreas and Biliary Tract. 2013;18(4):21-28
Laser lithotripsy of difficult biliary stones
Gastrointestinal Endoscopy. 1994;40(3):290-295
One-step transfistula large versus conventional balloon dilation following precut fistulotomy in difficult biliary cannulation for the removal of biliary stones: A multicenter retrospective study
Journal of Gastroenterology and Hepatology. 2014;29(7):1551-1556
Combined Partial Endoscopic Biliary Sphincterotomy and Endoscopic Balloon Sphincteroplasty in the Management of Difficult Bile Duct Stones
Gastrointestinal Endoscopy. 2007;65(5):AB220
Short-term biliary stenting before mechanical lithotripsy for difficult bile duct stones
Indian Journal of Gastroenterology. 2013;33(3):237-240
ENDOSCOPIC TREATMENT OF DIFFICULT COMMON BILE DUCT STONES
Digestive Endoscopy. 2010;22:S90-S97
Sa1498 Biliary Stenting Decreases the Size of Difficult Common Bile Duct Stones
Gastrointestinal Endoscopy. 2011;73(4):AB189
Sa1320 EFFICACY OF PER-ORAL CHOLANGIOSCOPY WITH INTRADUCTAL LITHOTRIPSY FOR DIFFICULT BILIARY STONES: A SYSTEMATIC REVIEW AND META-ANALYSIS
Gastrointestinal Endoscopy. 2018;87(6):AB211-AB212
Biliary sphincterotomy plus dilation with a large balloon for bile duct stones that are difficult to extract
Gastrointestinal Endoscopy. 2003;57(2):156-159