Sunanta, A., and S. Suranuntchai. “Development of Forming Processes for Back Bumper: Shell Bar RR Impact RH/LH from High Strength Steel Using Finite Element Simulation”. Naresuan University Engineering Journal, vol. 14, no. 1, June 2019, pp. 29-40, https://ph01.tci-thaijo.org/index.php/nuej/article/view/112585.