Gopal Lal Bansal, Neelu Sharma, Rajneesh Kumar Singhal, and Laxmi Agrawal. “A Comparative Study to Evaluate the Effectiveness of 0.5% Levobupivacaine Versus 0.5% Ropivacaine in Axillary Brachial Plexus Block”. International Journal of Health and Clinical Research, vol. 4, no. 15, Aug. 2021, pp. 372-4, https://ijhcr.com/index.php/ijhcr/article/view/2533.