Bhandari, S., M. Basnet, G. S. Shrestha, and M. N. Marhatta. “Oral Clonidine in Reduction of Postoperative Nausea and Vomiting After Laparoscopic Cholecystectomy: A Double Blinded Placebo Controlled Trial”. Journal of Society of Anesthesiologists of Nepal, vol. 1, no. 2, Oct. 2015, pp. 76-79, doi:10.3126/jsan.v1i2.13574.