Akhtar, Muhammad Talha, et al. “Pre-Emptive Analgesia by Intraperitoneal Instillation of Lignocaine in Laparoscopic Cholecystectomy”. Pakistan Armed Forces Medical Journal, vol. 73, no. SUPPL-1, July 2023, pp. S28-31, https://doi.org/10.51253/pafmj.v73iSUPPL-1.2868.