“The Experimental Seismic Performance of Positive and Negative Batter in a 2 X 2 Piles Group in Loose Sand”. Bilad Alrafidain Journal for Engineering Science and Technology 5, no. 1 (March 15, 2026): 15–23. Accessed May 19, 2026. https://bajest.bauc14.edu.iq/index.php/bajest/article/view/151.