S. Gauchan, C. Thapa, P. Shakya, R. Bhattarai, and S. Shakya, “Ondansetron and Granisetron for Prevention of Postoperative Nausea and Vomiting following Laparoscopic Cholecystectomy”, J Nepal Med Assoc, vol. 52, no. 193, pp. 682–686, Mar. 2014.