Ayad Abdulhameed Sulaibi , H. J. A. A. K. R. M. A.-J. “Experimental Verse Numerical Analysis of Seepage Through Homogeneous and Non-Homogeneous Earth Dams”. Design Engineering, Aug. 2021, pp. 10147-58, http://thedesignengineering.com/index.php/DE/article/view/3737.