Ahmed, Ifran, et al. “Comparison of Effectiveness Between Dexamethasone and Clonidine As an Adjuvant to Bupivacaine for Ultrasound-Guided Supraclavicular Brachial Plexus Block in Patients Undergoing Upper Limb Surgery”. Journal of Enam Medical College, vol. 13, no. 1, Feb. 2026, pp. 10-21, doi:10.3329/jemc.v13i1.81959.