Onsalung, Nirut, Chawalit Thinvongpituk, and Amphisak Teeboonma. 2012. “Study on the Crashworthiness of Model Bus Side Frame under Crushing Load”. Engineering and Applied Science Research 34 (3):343-54. https://ph01.tci-thaijo.org/index.php/easr/article/view/1826.