Phongsai, T., B. Chongthairungruang, V. Uthaisangsuk, S. Suranuntchai, and S. Jirathearanat. 2018. “Influence of elastic modulus change by springback prediction of high strength steel”. Journal of Research and Applications in Mechanical Engineering 1 (4):21-26. https://ph01.tci-thaijo.org/index.php/jrame/article/view/149447.