Sharan, Radhe, Manjit Singh, Joginder Pal Attri, and Davinder Dr Davinder Singh. 2016. “Additive Effect of Butorphanol in Supraclavicular Brachial Plexus Block”. International Journal of Medical Research and Review 4 (6), 910-17. https://doi.org/10.17511/ijmrr.2016.i06.08.