1. http://www.thehydrogenjournal.com/marketingpr.php?PHPSESSID=m0t7rorhd0cpsbmjgs0he8jrh7;
2. an online and print magazine news service for the hydrogen industry, checked as at 7th February 2011.
3. Global issues: Social, political, economic and environmental issues that affect us all,2010
4. World commission on environment and development, our common future,1987
5. Basic research needs for the hydrogen economy; report of the basic energy sciences workshop on hydrogen production, storage, and use. An online publication of the US Department of Energy, May 13–15 2003. http://www.science.doe.gov/bes/Hydrogen.pdf.