Mohan, H., R. Ramappa, S. M., and A. B. K. “Intravenous Paracetamol Infusion Versus Intramuscular Tramadol As an Intrapartum Labor Analgesic”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 4, no. 6, Feb. 2017, pp. 1726-9, doi:10.18203/2320-1770.ijrcog20151212.