Thongtip, Tongchana, and Saharat Chanthanumataporn. “Crashworthiness Investigation of Multi-stage Structures Designed for Underrun Protection Devices”. Applied Science and Engineering Progress 14, no. 3 (July 13, 2021): 328–337. accessed August 27, 2026. https://ph02.tci-thaijo.org/index.php/ijast/article/view/244816.