Atri, Ankita, Ajay Gupta, and Smriti Gulati. 2021. “Comparison of Dexmedetomidine and Butorphanol As Adjuvants to Levobupivacaine for Epidural Anaesthesia in Hip and Lower Limb Surgeries: A Randomized Controlled Trial ”. JK Science: Journal of Medical Education & Research 23 (4):195-99. https://journal.jkscience.org/index.php/JK-Science/article/view/87.