Nayak SP, Dhar R, Mohanty D. Total knee replacement: a randomized study of clonidine and dexmedetomidine used for epidural postoperative analgesia. Int J Res Orthop [Internet]. 2016 Dec. 29 [cited 2025 Dec. 3];3(1):134-9. Available from: https://www.ijoro.org/index.php/ijoro/article/view/177