M. Raghupraveen Kumar, V.Sreelatha, T.Swathi Priyadarshini, and P.V.S.Lavanya, “A study on comparison between 0.5% levobupivacaine and 0.5% ropivacaine in supraclavicular brachial plexus blockade - A randomized clinical trial”, Int. J. Heal. Clin. Res., vol. 4, no. 15, pp. 239–245, Aug. 2021.