Singh, B., and I. Singh. “Comparison of 0.5% Ropivacaine and 0.5% Bupivacaine in Supraclavicular Brachial Plexus Block For Upper Limb Surgery”. Academia Anesthesiologica International, Vol. 4, no. 1, Mar. 2019, pp. 29-32, doi:10.21276/aan.2019.4.1.7.