1. World Steel Association: Fact Sheet: Steel and raw materials, 2022. Available at https://worldsteel.org/wp-content/uploads/Fact-sheet-steel-and-raw-materials.pdf (Accessed 17 April 2022)
2. World Steel Association: 2020 World steel in figures, 2020. Available at https://worldsteel.org/wp-content/uploads/2020-World-Steel-in-Figures.pdf (Accessed 18 April 2022)
3. World Steel Association: 2010 World steel in figures, 2010. Available at https://worldsteel.org/wp-content/uploads/2010-World-Steel-in-Figures.pdf (Accessed 18 April 2022)
4. P. Oustadakis, P.E. Tsakiridis, A. Katsiapi, and S. Agatzini-Leonardou: J. Hazard. Mater., 2010, vol. 179, pp. 1–7.
5. A.J.B. Dutra, P.R.P. Paiva, and L.M. Tavares: Miner. Eng., 2006, vol. 19, pp. 478–85.