Agarwal, Babita, and Pratik Jain. 2019. “Comparative Study of Postoperative Analgesia by Epidural Ketamine and Ketamine Plus Dexamethasone in Lower Limb Orthopedic Surgery”. International Journal of Medical Research and Review 7 (4), 300-308. https://doi.org/10.17511/ijmrr.2019.i04.08.