Amorín Cal, Raúl. “Bowel Obstruction Caused by a Gallstone (gallstone Ileus)”. Cirugía del Uruguay 37, no. 1-2 (October 8, 2020): 89–92. Accessed June 11, 2026. https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/1921.