Castorina, S., T. Luca, G. Privitera, V. Riccioli, G. Musumeci, and C. Loreto. “A Contribution to the Gross Anatomy of Human Extra-Hepatic Bile Ducts With Multi Slice Computed Tomography”. Italian Journal of Anatomy and Embryology, vol. 122, no. 1, Oct. 2017, p. 53, https://oajournals.fupress.net/index.php/ijae/article/view/1796.