1. Advances in Titanium Extraction Metallurgy
2. N.H. Orr, Light Metals, TMS, Warrendale, PA, 1982, pp. 1149–1156
3. R. Powell, Titanium Oxide and Titanium Tetrachloride, Noyes Devel. Co., New York, 1968, pp. 1–6
4. O. Nado, Light Metals, TMS, Warrendale, PA, 1988, pp. 759–768