Ceran, C., O. Karadag, K. Gurunluoglu, and C. Onal. “Colon Perforation and Transanal Protrusion of Ventriculo-Peritoneal Shunt: Two Cases”. Annals of Medical Research, vol. 13, no. 4, May 2021, pp. 0271-3, http://www.annalsmedres.org/index.php/aomr/article/view/3394.