Arslan, Baha, Tugbahan Yilmaz, Varlik Erol, and Huseyin Gulay. 2021. “Asymptomatic Cholecysto-Enteric Fistula and Gallstone Ileus: Two Case Reports”. Annals of Medical Research 26 (1):0113-16. http://www.annalsmedres.org/index.php/aomr/article/view/1397.