Sushant Saxena, Sana Hussain, Mayank Karode, and Ashish Saraogi, “Comparative Study Between Bupivacaine and Bupivacaine with Tramadol in Different Doses for Supraclavicular Brachial Plexus Block”, Int. J. Heal. Clin. Res., vol. 4, no. 22, pp. 291–296, Dec. 2021.