Traini, C., M. S. Faussone-Pellegrini, S. Evangelista, K. Mazzaferro, G. Cipriani, P. Santicioli, and M. G. Vannucchi. “Inner and Outer Portions of Colonic Circular Muscle: Ultrastructural and Immunohistochemical Changes in Rat Chronically Treated With Otilonium Bromide”. Italian Journal of Anatomy and Embryology, vol. 119, no. 1, Mar. 2015, p. 195, https://oajournals.fupress.net/index.php/ijae/article/view/2548.