Sharma, Mahesh, Kalpana Kharbuja, and Bikash Khadka. “Comparison of Pethidine and Tramadol for the Control of Shivering in Patients Undergoing Elective Surgery under Spinal Anesthesia”. Journal of Lumbini Medical College 4, no. 2 (January 26, 2017): 66–67. Accessed January 21, 2022. https://www.nepjol.info/index.php/JLMC/article/view/16464.