Kamal, M. M., Al Maruf, A., Yeasmeen, S., & Hye, A. (2014). Postoperative analgesia after lumbar disc surgery: A comparison between ketorolac and opioid. Journal of the Bangladesh Society of Anaesthesiologists, 23(2), 56–61. https://doi.org/10.3329/jbsa.v23i2.18175