Sharma, NR, U Rai, S Panthee, and P Shrestha. 2014. “A Comparison of Epidural Analgesia Provided by Bupivacaine Plus Pethidine, Bupivacaine Plus Morphine, or Bupivacaine Plus Morphine Plus Midazolam for Lower Limb Orthopaedic Surgery”. Journal of Chitwan Medical College 4 (1):19-21. https://nepjol.info/index.php/JCMC/article/view/10842.