Kataria, A. P., J. Pal Attri, N. Singh, and M. Thakur. “Comparative Study of Ketorolac Versus Butorphanol As an Adjuvant in Intravenous Regional Anaesthesia (IVRA)”. International Journal of Medical Research and Review, Vol. 4, no. 2, Feb. 2016, pp. 193-8, doi:10.17511/ijmrr.2016.i02.012.