Jain, C., Sinha, M., Rani, R. and Tiwari, A. (2016) “Glyceryl trinitrate patch versus intravenous ritodrine for tocolysis in pre-term labour”, International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 5(12), pp. 4447–4452. doi: 10.18203/2320-1770.ijrcog20164361.