Hossain, M. S.; Islam, M.; Rashid, M. M.; Rahman Babu, M. A.; Saha, D. Evaluation of Efficacy of Oral Tramadol As Premedication in Preventing Post Operative Shivering After General Anesthesia - A Prospective Study. J. Dhaka Natl. Med. Coll. Hosp. 2018, 24, 6-9.