Ungania, Silvio, and Nives Barletta. “Congenital Dilatation of the Biliary System in Adult: About Three Clinical Cases”. Annali Italiani Di Chirurgia, vol. 82, no. 6, Nov. 2011, pp. 493-8, https://annaliitalianidichirurgia.it/index.php/aic/article/view/3083.