1. S.E. Olsen, M. Tangstad, and T. Lindstad: Production of Manganese Ferroalloys, Tapir Academic Press, Trondheim, Norway, 2007, pp. 1–247.
2. S.E. Olsen and M. Tangstad: in INFACON X: Transformation Through Technology, South African Institute of Mining and Metallurgy, Cape Town, South Africa, 2004, pp. 231–38.
3. F. Habashi: Handbook of Extractive Metallurgy, vol. 1, Wiley-VCH, Weinheim, 1997.
4. D.B. Wellbeloved, P.M. Craven, and J.W. Waudby: in Ullmann’s Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2012, pp. 175–221.
5. J.D. Steenkamp, J.P. Gous, P.C. Pistorius, M. Tangstad, and J.H. Zietsman: in Furnace Tapping Conference 2014, Southern African Institute of Mining and Metallurgy, Johannesburg, South Africa, 2014, pp. 51–64.