Choudhary, A., Maheshwari, S., Paliwal, N., Ujwal, S. and Singariya, G. 2020. Comparative study of fentanyl versus tramadol as adjuvant with low dose local anaesthetic ropivacaine (0.1%) for epidural labour analgesia. International Journal of Research in Medical Sciences. 8, 9 (Aug. 2020), 3309–3314. DOI:https://doi.org/10.18203/2320-6012.ijrms20203684.