Maharjan, SK, and S Shrestha. “Intraperitoneal Magnesium Sulphate Plus Bupivacaine for Pain Relief After Laparoscopic Cholecystectomy”. Journal of Kathmandu Medical College, vol. 1, no. 1, Dec. 2012, pp. 21-25, doi:10.3126/jkmc.v1i1.7251.