Singh, S., Sah, B., Ghimire, A., Prasad, J. and Baral, D. 2012. Comparisons of tramadol with pethidine for prevention of post anaesthetic shivering in elective abdominal surgery. Health Renaissance. 10, 3 (Dec. 2012), 220–223. DOI:https://doi.org/10.3126/hren.v10i3.7139.