M. U. Farooq, F. Younis, M. Atif, R. A. S. Khan, A. Khalique, and A. Adnan, “Comparison of Pethidine and Ketamine for the Treatment of Postoperative Shivering”, Pak Armed Forces Med J, vol. 72, no. 3, pp. 801–05, Jun. 2022, doi: 10.51253/pafmj.v72i3.4377.