Duong, Tham. “Studying the Applicability of Non-Destructive Techniques in Diagnosing Defects of Soil-Cement Columns”. Science and Technology Development Journal 23, no. 4 (January 15, 2021): 808-814. Accessed April 2, 2025. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/2474.