1. A. A. Eremin, Magnitka 4.0: (Magnitogorsk Iron and Steel Works) Interviewed about What Has Been Digitized at the MMK and How to Make Steel Without Human Intervention [in Russian]; http://www.mashportal.ru/interview-49200.aspx (access date: 4/29/2019).
2. The NLMK Group Combines Digital Transformation and Information Technology [in Russian]; http://www.metalinfo.ru/ru/news/108069 (access date: 4/29/2019).
3. The Metalloinvest Has Transformed Business Processes Based on the Industry 4.0 Principles [in Russian]; http://www.metalinfo.ru/ru/news/103230 (access date: 4/29/2019).
4. I. G. Tovarovskii, Blast-Furnace Smelting [in Ukrainian], Porogi, Dnepropetrovsk (2009).
5. M. Geerdes, R. Chaigneau, I. Kurunov, O. Lingiardi, and J. Ricketts, Modern Blast Furnace Ironmaking. An Introduction, IOS Press, Amsterdam (2015).