Singh, Preetilata, Akil Hussain, Rajarajan B, Mohammed Mishal, and Hemant Jingar. “A Comparative Study of Efficacy of Analgesiaand Anaesthesia Between Intrathecal ButorphanolAndFentanyl With Bupivacaine 0.5% Heavy for Lower Limb Orthopedic Surgery: A Prospective Randomized Study”. International Journal of Health and Clinical Research 4, no. 3 (February 7, 2021): 56–60. Accessed July 3, 2024. https://ijhcr.com/index.php/ijhcr/article/view/871.