Warsiyanto, Budi Aji, Muhammad Hadi Widanto, Ilham Musthofa, Ichsan Maulana, Sahril Afandi Sitompul, and Endah Yuniarti. 2021. “The Effect of Cross-Section and Elliptical Hole Ratio on Crashworthiness Parameters of Crash-Box Structure”. Indonesian Journal of Aerospace 19 (1):1-14. https://doi.org/10.30536/j.jtd.2021.v19.a3408.