1. 1) M.Takahashi: Tetsu-to-Hagané, 100(2014), 82 (in Japanese). https://doi.org/10.2355/tetsutohagane.100.82
2. 2) S.Torizuka, S.Takagi and T.Senuma: Shinayaka de Tsuyoi Tekkouzairyou (Tough and Strong Steel Material), NTS, Tokyo, (2016), 399 (in Japanese).
3. 3) T.Furuhara, K.Osawa, O.Furukimi, Y.Hosotani and Y.Funakawa: Jidoushayou Haiten: Sono Tanjou to Shinka no Sokuseki (High-tensile Strength Steel for Automotive Application: History of Development and Evolution), JFE 21st Century Foundation, Tokyo, (2008), 119 (in Japanese).
4. 4) K.V.Vidyanandan: Energy Scan, 3(2018), 7.
5. 5) W.Y.Ki, S.-J.Heo, D.-O.Kang, H.J.Yim, K.W.Lee, J.H.Kim and C.K.Lee: J. Adv. Mech. Des. Syst. Manuf., 10(2016), JAMDSM0069. https://doi.org/10.1299/jamdsm.2016jamdsm0069