Traini, C., G. Cipriani, S. Evangelista, P. Santicioli, M. Faussone-Pellegrini, and M. Vannucchi. “Chronic Treatment With Otilonium Bromide Affects the Tachykinergic and Nitrergic Systems in the Rat Colon”. Italian Journal of Anatomy and Embryology, vol. 117, no. 2, Feb. 2013, p. 194, https://oajournals.fupress.net/index.php/ijae/article/view/4380.