Singh J, Verma V, Sood P, Thakur A, Rana S, Thakur L. Midazolam as an adjunct to lignocaine at two different doses in ultrasound-guided supraclavicular brachial plexus block: a randomized controlled trial. Ain-Shams Journal of Anaesthesiology. 2016: 9. 549. 10.4103/1687-7934.198248.