Khan, F., and V. P. Singh. “A Comparative Study of Intravenous Versus Perineural Administration of Dexmedetomidine in Supraclavicular Brachial Plexus Block Using 0.75% Ropivacaine by Ultrasound Guided Technique in Upper Limb Surgeries”. International Journal of Research in Medical Sciences, vol. 6, no. 7, June 2018, pp. 2407-13, doi:10.18203/2320-6012.ijrms20182826.