1. C. K. Gupta and N. Krishnamurthy, Extractive Metallurgy of Vanadium (Elsevier Science Publishers B.V., Amsterdam, 1992), p. VII.
2. G. Z. Ye, Recovery of Vanadium from LD Slag, A state of the art report, Part 1 - Facts and Metallurgy of Vanadium, Internal MEFOS report, Stockholm, 2006.
3. M. Lindvall, Selective Oxidation of Vanadium Prior to Iron and Phosphorus, Luleå University of Technology, Luleå, Sweden, 2006, (Master thesis), pp. 5-12.
4. Concentrating of vanadium oxide in vanadium rich phase(s) by addition of SiO2in converter slag
5. G. Z. Ye, Vanadium Recovery from LD Slag, A State of the art report, Part II-Recovery of Vanadium from Iron and Steelmaking, Internal MEFOS report, Stockholm, 2006.