Sunanta, Aekkapon, and Surasak Suranuntchai. 2019. “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 14 (1). Phitsanulok, Thailand:29-40. https://ph01.tci-thaijo.org/index.php/nuej/article/view/112585.