Karim Amin, Abdulla, et al. “Estimating of Dynamic Modulus of Elasticity for Top Soil Layers by Borehole Seismic Survey in Industrial Area of Sulaimani City, NE-Iraq”. Journal of Kufa-Physics, vol. 7, no. 2, Dec. 2015, https://journal.uokufa.edu.iq/index.php/jkp/article/view/7482.