Shrestha, S., Bhattarai, B., & Shah, R. (2015). Comparative Study of Hyperbaric Bupivacaine Plus Ketamine Vs Bupivacaine Plus Fentanyl for Spinal Anaesthesia during Caeserean Section. Kathmandu University Medical Journal, 11(4), 287–291. https://doi.org/10.3126/kumj.v11i4.12523