1. Titanium: A Technical Guide;Donachie,1988
2. The Encyclopedia of the Chemical Elements;Clifford,1968
3. The History and Use of Our Earth’s Chemical Elements: A Reference Guide;Bracken,1999
4. CRC Handbook of Chemistry and Physics, Vol. 85;Lide,2004
5. Nature’s Building Blocks : An A-Z Guide to the Elements;Emsley,2001