“A Comparative Study to Assess the Effect of Intrathecal Bupivacaine With Morphine or Butorphanol on Post-Operative Pain Relief Following Abdominal and Vaginal Hysterectomy”. Health Renaissance 11, no. 3 (January 17, 2014): 246–249. Accessed July 5, 2026. https://www.nepjol.info/index.php/HREN/article/view/9640.