Kumar, J.; Sweta, .; Lata, K. K.; Prasad, B. K.; Gupta, V. K. Comparative Study of (0.5%) Levobupivacaine and (0.75%) Ropivacaine in Supraclavicular Brachial Plexus Block by Lateral Approach. Int J Res Med Sci 2017, 5, 2426-2429.