Maharjan, SK, and S Shrestha. “Intraperitoneal and Periportal Injection of Bupivacaine for Pain After Laparoscopic Cholecystectomy”. Kathmandu University Medical Journal 7, no. 1 (April 13, 2009): 50–53. Accessed December 7, 2025. https://nepjol.info/index.php/KUMJ/article/view/1765.