Kokane, Abhijeet, and Pundalik Sonawane. 2017. “Comparative Study of Transdermal Nitroglycerine Patch Vs. Intramuscular Isoxsuprine in Treatment of Preterm Labour”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 4 (5):1471-77. https://doi.org/10.18203/2320-1770.ijrcog20150731.