Phongsai, T., B. Chongthairungruang, V. Uthaisangsuk, S. Suranuntchai, and S. Jirathearanat. “Influence of elastic modulus change by springback prediction of high strength steel”. Journal of Research and Applications in Mechanical Engineering, vol. 1, no. 4, Oct. 2018, pp. 21-26, https://ph01.tci-thaijo.org/index.php/jrame/article/view/149447.