Mishra, R. K.; Raya, A.; Shrestha, A.; Yadav, B. K. Intraperitoneal Magnesium Sulphate-Bupivacaine Vs Tramadol-Bupivacaine for Pain Relief Post Laparoscopic Cholecystectomy: A Comparative Cross-Sectional Study. J Coll Med Sci-Nepal 2025, 21, 41-45.