Ilyas, Muhammad, et al. “EFFICACY OF ONDANSETRON AND METOCLOPRAMIDE AGAINST POSTOPERATIVE NAUSEA AND VOMITING IN PATIENTS UNDERGOING LAPAROSCOPIC CHOLECYSTECTOMY”. Journal of Medical Sciences, vol. 25, no. 1 Suppleme, Mar. 2017, pp. 123-6, https://jmedsci.com/Jmedsci/article/view/97.