1. “European Waste Catalogue and Hazardous Waste List”, Environmental Protection Agency, Ireland, Valid from 1 January 2002.
2. J.Y. Hwang, X. Huang, and Z. Xu: JMMCE, 2006, vol. 5, no. 1, pp. 47–62.
3. A. Gil and S.A. Korili: Environ Manage, ed. S.K. Sarkar, Intech Pub., 2010, pp. 149–58.
4. P. Li, M. Guo, M. Zhang, L.D. Teng, S. Seetharaman: Metall. Mater. Trans. B., 2012, vol. 43B, pp. 1220–30.
5. P. Li, M. Guo, M. Zhang, L.D. Teng, S. Seetharaman: Trans. IMM C., 2012, vol.121, no.3, pp.140–46.