Ahmad, Jamil, et al. “EFFICACY OF PORT-SITE AND INTRAPERITONEAL APPLICATION OF BUPIVACAINE IN REDUCING EARLY POST-LAPAROSCOPIC CHOLECYSTECTOMY PAIN: Post-Laparoscopic Cholecystectomy Pain”. Pakistan Armed Forces Medical Journal, vol. 65, no. 2, Apr. 2015, pp. 211-5, https://www.pafmj.org/PAFMJ/article/view/813.