Othman, Z. A., and M. S. Saeed. “Doppler Ultrasound in Intrauterine Growth Retardation and Its Indices in Correlation With Gestational Age”. Zanco Journal of Medical Sciences (Zanco J Med Sci), vol. 21, no. 1, Apr. 2017, pp. 1594-00, doi:10.15218/zjms.2017.008.