Sanghvi, Kinjal S., Vibhuti A. Shah, and Kirti D. Patel. 2017. “Comparative Study of Bupivacaine Alone and Bupivacaine Along With Buprenorphine in Axillary Brachial Plexus Block: A Prospective, Randomized, Single Blind Study”. International Journal of Basic & Clinical Pharmacology 2 (5):640-44. https://www.ijbcp.com/index.php/ijbcp/article/view/1333.