Patmano, M., D. Ali Cetin, T. Gumus, and S. Yildirim. “A Rare Foreign Body During Colonoscopy: Headpiece of Enema Kit”. Annals of Medical Research, vol. 25, no. 3, May 2021, pp. 0493-4, http://www.annalsmedres.org/index.php/aomr/article/view/1447.