Y-16. T. Yasutomi, R. Nishimura, S. Yonemura, M. Nakata, T. Yoshida, and M. Mizumura, “Shearing Technology for High-tensile-strength Steel,” Nippon Steel Technical Report, No.122 (2019), pp.28-34; https://www.nipponsteel.com/en/tech/report/pdf/122-06.pdf
N-32. R. Nishimura, Y. Tanaka. T. Miyagi, M. Ogawa, K. Otsuka, and Y. Nakazawa, “Development of Forming Methods for Functional Improvement of Car Body Structural Parts,” Nippon Steel Technical Report, No. 122, November 2019, page 13; https://www.nipponsteel.com/en/tech/report/pdf/122-04.pdf