Piazze, Alvaro, and Alvaro Ruocco. “Treatment of Residual Lithiasis of the Common Bile Duct With External Biliary Drainage by Guided Endoscopic Papillotomy”. Cirugía del Uruguay 66, no. 2 (April 18, 1996): 99–103. Accessed May 24, 2026. https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/4237.