Tawatchai Tanchaisawat, D.T. Bergado, and Taweesak Kanjananak. “Lightweight Geomaterials for Bridge Approach Utilization on Soft Ground Area”. Agriculture and Natural Resources 41, no. 5 (December 31, 2007): 357–363. accessed October 10, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/244393.