Gudenau, H. W., D. Senk, A. Babich, C. Fröhling, O. S. Kueon, S. Wang, and X. Wieting. 2005. “CO2 Problems and Waste Recycling. Research at the Institute of Ferrous Metallurgy”. Revista De Metalurgia 41 (2):139-47. https://doi.org/10.3989/revmetalm.2005.v41.i2.198.