Perrone, Luis, Roberto Estrugo, ma Bounous, Juan A Paperán (h), Carlos Bercianos, and Alberto Lerena. 1977. “The Papillosphincterotomy in Hydatid Liver Cysts Opening into the Biliary Tract”. Cirugía Del Uruguay 47 (2):131-35. https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/2830.