Kaur, M., Goel, B., & Singh, J. (2018). Comparative study of nitroglycerin dermal patch versus nifedipine in the management of preterm labour. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 7(10), 4243–4248. https://doi.org/10.18203/2320-1770.ijrcog20184160