Bashir, B., Shafiq, M., Nazir, A., Alam, M., Taimoor, A., & Munazza, B. (2019). Effectiveness of transdermal nitroglycerine compared to oral nifedipine in prevention of preterm labour. Pakistan Journal of Physiology, 15(4), 7-10. Retrieved from https://pjp.pps.org.pk/index.php/PJP/article/view/1113