Pathak, N., Tiwari, T., Singh, S., Manik, Y.K., Dhama, V.K. and Dahiya, S. 2018. A clinical comparative study of ropivacaine versus ropivacaine with fentanyl by continuous epidural infusion for post-operative analgesia and ambulation in patients undergoing major gynecological surgery. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 7, 4 (Mar. 2018), 1561–1566. DOI:https://doi.org/10.18203/2320-1770.ijrcog20181356.