Aryal, D., R. Gurung, and M. N. Marhatta. “Evaluation of the Effect of Gabapentin on Postoperative Analgesia With Epidural Morphine After Abdominal Hysterectomy”. Journal of College of Medical Sciences-Nepal, vol. 13, no. 2, July 2017, pp. 251-7, doi:10.3126/jcmsn.v13i2.16427.