Varela, José R., Enrique Petracchi, Matías B. Quesada, Magali Muthular, Luciano Coiz, Héctor Posada, Carlos Canullan, and Federico Yazyi. “Gallstone Ileus: Analysis of 21 Cases”. Revista Argentina de Cirugía 115, no. 3 (August 25, 2023): 233–242. Accessed April 19, 2025. https://revista.aac.org.ar/index.php/RevArgentCirug/article/view/612.