Malak, A. M., A. Shameem, C. A. Ali, and M. A. Qureshi. “Comparison of Ondansetron, Cyclizine and Prochlorperazine for PONV Prophylaxis in Laparoscopic Cholecystectomy”. Anaesthesia, Pain & Intensive Care, Vol. 21, no. 4, Jan. 2019, pp. 453-7, https://mail.apicareonline.com/index.php/APIC/article/view/92.