Basnet, Ujjwal. 2018. “A Comparative Study of Intrathecal Hyperbaric Bupivacaine With or Without Morphine for Post-Operative Analgesia in Hysterectomy”. Nepal Journal of Obstetrics and Gynaecology 13 (1):34-37. https://nepjol.info/index.php/NJOG/article/view/21615.