Deo, G. P., Shrestha, S. K. and Shrestha, I. N. (2017) “Epidural butorphanol for post operative analgesia in lower limb surgeries: A comparative study with epidural tramadol”, Journal of Chitwan Medical College, 6(3), pp. 26–32. Available at: https://nepjol.info./index.php/JCMC/article/view/16696 (Accessed: 23 November 2024).