Usha Rani, K., V. Zutshi, M. Patel, and S. Marwah. “Analgesic Efficacy of Intravenous Paracetamol Versus Intravenous Tramadol After Caesarean Section: A Single Blind Randomized Controlled Study”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 5, no. 12, Dec. 2016, pp. 4285-9, doi:10.18203/2320-1770.ijrcog20164329.