Ibraheem, D. A. Y. “Comparison Between Preventive Analgesia Versus Postoperative Analgesia With Combined Paracetamol and Ketorolac in Laparoscopic Cholecystectomy”. Academic Journal of Clinicians, vol. 6, no. 3, July 2024, pp. 61-70, https://clinician.site/index.php/ajcs/article/view/108.