Hossain, M.S. et al. 2018. Evaluation of efficacy of oral Tramadol as premedication in preventing post operative shivering after General Anesthesia - A Prospective Study. Journal of Dhaka National Medical College & Hospital. 24, 2 (Sep. 2018), 6–9. DOI:https://doi.org/10.3329/jdnmch.v24i2.80029.