ALTINTAŞ, Engin, et al. “Alverine Citrate Plus Simethicone Reduces Cecal Intubation Time in Colonoscopy - A Randomized Study”. Turkish Journal of Gastroenterology, vol. 19, no. 3, Jan. 2008, pp. 174-9, https://www.turkjgastroenterol.org/index.php/tjg/article/view/1656.