lakhe, G., K. M. Adhikari, K. Khatri, A. Maharjan, A. Bajracharya, and H. Khanal. “Prevention of Shivering During Spinal Anesthesia: Comparison Between Tramadol, Ketamine and Ondansetron”. Journal of Nepal Medical Association, vol. 56, no. 208, Dec. 2017, pp. 395-00, doi:10.31729/jnma.3377.