1. Pistorius, P.C. and Motlhamme, T., Journal of Minerals Engineering, 2006, vol. 19, pp. 232–236.
2. Xiong, S.R, Yuan, Z.F., Xu, C., and Xi, L., Journal of Transaction Nonferrous Met. Soc. China, 2010, vol. 23, pp. 128–134.
3. Movahedian, A., Raygan, Sh., and Pourabdoli, M., Thermodynamic Acta, 2010, vol. 512, pp. 93–97.
4. Habashi, F., Handbook of Extractive Metallurgy (Titanium), Wiley-VCH, 1997, vol. 2.
5. Fedorov, S.G, Nikolaev, A.I., Brylyakov, Y.E., Gerasimova, L.G., and Vasilyeva, N.Y., J. Non-ferrous, 2003, vol. 21, pp. 436–442.