1. Allison, J.D., Brown, D.S. & Novo-Gradac, K.J. (1991). MINTEQA2/PRODEFA2- user's manual (version 3.0). A geochemical assessment model for environmental systems. U.S. Environmental Protection Agency, Athens, GA. EPA/600/3-91/021.
2. Azapagic, A. (2004). Developing a framework for sustainable development indicators for the mining and minerals industry. Journal of Cleaner Production, 12, 639–662.
3. Bishop, C.M. (1995). Neural networks for pattern recognition. Oxford: Clarendon.
4. Bouckaert, R.R., Frank, E., Hall, M., Kirkby, R., Reutemann, P., Seewald, A., et al. (2010). WEKA manual (version 3.6.4). Hamilton: University of Waikato.
5. Cherkassky, V.S., & Mulier, F. (2007). Learning from data: concepts, theory, and methods. New Jersey: Wiley.