Noor, H., M. Manzoor, S. Sadiq, and N. Shahzad. “Maternal History and Second Trimester Uterine Artery Doppler in the Assessment of Risk for Development of Early and Late Onset Pre-Eclampsia and Intra Uterine Growth Restriction”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 5, no. 5, Jan. 2017, pp. 1571-6, doi:10.18203/2320-1770.ijrcog20161327.