BelletruttiP., GerdesH., and SchattnerM. “Successful Endoscopic Ultrasound-Guided Transduodenal Biliary Drainage Through a Pre-Existing Duodenal Stent”. JOP. Journal of the Pancreas, Vol. 11, no. 3, May 2010, pp. 234-6, doi:10.6092/1590-8577/3819.