MUHAMMAD ASLAM JAVED, HINA KHAN MUHAM, SHAHZAD ALAM SHAH. 2018. “Pre-Emptive Analgesia in Laparoscopic Cholecystectomy by Intraperitoneal Instillation of Bupivacain”. Journal of Fatima Jinnah Medical University 10 (2). https://www.jfjmu.com/index.php/ojs/article/view/454.