S. Khanna, B. Gogoi, V. Sharma, and K. Prasad, “Dexmedetomidine as an adjuvant drug for ultrasound guided interscalene block for shoulder arthroscopic surgeries: prospective observational study”, Int. J. Heal. Clin. Res., vol. 3, no. 11, pp. 308–313, Dec. 2020.