A rare cause of mechanical intestinal obstruction in geriatric population: Gallstone ileus three cases . Annals of Medical Research, [S. l.], v. 26, n. 1, p. 0117–0120, 2021. Disponível em: http://www.annalsmedres.org/index.php/aomr/article/view/1396. Acesso em: 22 oct. 2025.