1. M. Ashby, Materials and the environment: eco-informed material choice: second edition, 2012. https://doi.org/ 10.1016/C2010-0-66554-0.
2. Sustainable Materials: With Both Eyes Open;Allwood,2012
3. What do we know about metal recycling rates?;Graedel;J. Ind. Ecol.,2011
4. Strategies For Improving the Sustainability of Structural Metals;Raabe,2019
5. E. Basson, Major steel-producing countries 2018 and 2019 million, 2020 World Steel Fig. (2020) 1–8. https://www.worldsteel.org/publications/fact-sheets.html.