Kumar, P., Kanna, V., ., K. and ., A. (2018) “A clinical study of comparison of effect with 0.15% ropivacaine and fentanyl 2mcg/ml versus 0.125% bupivacaine and fentanyl 2mcg/ml epidurally for labour analgesia”, International Journal of Research in Medical Sciences, 6(4), pp. 1422–1428. doi: 10.18203/2320-6012.ijrms20181308.