G. Solanki, S. Kaushik, S. Bharadiya, and A. Rathore, “Efficacy of Clonidine as an Adjuvant to Ropivacaine in Supraclavicular Brachial Plexus Block in Patients undergoing Upper limb Surgery: A Randomized Controlled Trial”, Int. Res. Med. Health Sci., vol. 4, no. 5, pp. 6-11, Nov. 2021.