ELLİDOKUZ, Ender, et al. “The Effect of demöoperidone on Gallbladder and Sphincter of Oddi Motility in Human”. Turkish Journal of Gastroenterology, vol. 8, no. 2, Jan. 1997, pp. 163-7, https://turkjgastroenterol.org/index.php/tjg/article/view/774.