Rustagi, P., G. A. Patkar, Y. Malpani, and B. A. Tendolkar. “Clonidine As an Adjuvant to Local Anesthetic in Supraclavicular Brachial Plexus Block: A Randomized, Double Blinded Placebo Controlled Study”. International Journal of Basic & Clinical Pharmacology, vol. 5, no. 5, Jan. 2017, pp. 1892-7, doi:10.18203/2319-2003.ijbcp20162849.