[1]
A. Al Maruf, I. H. Chowdhury, K. A. Lateef, M. H. Laskar, and M. M. Kamal, “Epidural administration of ketamine or fentanyl with bupivacaine for postoperative analgesia – A comparative study”, j Bangladesh Soc Anaesthesiologists, vol. 22, no. 1, pp. 21–25, Feb. 2014.