Kokane, A., and P. Sonawane. “Comparative Study of Transdermal Nitroglycerine Patch Vs. Intramuscular Isoxsuprine in Treatment of Preterm Labour”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 4, no. 5, Feb. 2017, pp. 1471-7, doi:10.18203/2320-1770.ijrcog20150731.