M. Nafees, M. I. Ibrahim, and M. H. Akram, “SENSITIVITY AND SPECIFICITY OF PULSATILITY INDEX UMBILICAL ARTERY AND MIDDLE CEREBRAL ARTERY IN DETECTING INTRA UTERINE GROWTH RESTRICTION: Pulsatility Index”, Pak Armed Forces Med J, vol. 64, no. 1, pp. 161–166, Mar. 2014, Accessed: Apr. 17, 2025. [Online]. Available: https://pafmj.org/PAFMJ/article/view/611