1. 1) H. Kimura: Nippon Steel Tech. Rep., 61 (1994), 65, https://www.nipponsteel.com/en/tech/report/nsc/pdf/6110.pdf, (accessed 2020-03-30).
2. 2) S. K. Paul, A. Raj, P. Biswas, G. Manikandan and R. K. Verma: Mater. Des., 57 (2014), 211. https://doi.org/10.1016/j.matdes.2013.12.047
3. 3) T. K. Roy and T. Venugopalan: Assessment of Cleanliness in Interstitial Free Steel, Tata Steel, http://www.iim-delhi.com/upload_events/01AssessmentCleanlinessInterstitialFreeSteel_TataSteel.pdf, (accessed 2020-03-30).
4. 4) J. Chen, Y. Kan, Y. Hao, G. Liu and A. Xiong: J. Iron Steel Res. Int., 16 (2009), 33. https://doi.org/10.1016/S1006-706X(10)60024-6
5. 5) H. Takechi: IF Steels 2003: Int. Forum for the Properties and Application of IF Steels, Iron and Steel Institute of Japan, Tokyo, (2003), 440.