1. The Hydrogen Economy
2. Hydrogen: The Fuel of the Future?
3. President's Hydrogen Fuel Initiative: A Clean and Secure Energy Future; US Department of Energy; at http://www.hydrogen.energy.gov/presidents_initiative.html;
4. High Hopes for Hydrogen
5. The Hydrogen Economy: Opportunities, Costs, Barriers and R&D Needs, National Research Council and the National Academy of Engineering, National Academies Press, 2004, at http://www.nap.edu/catalog.php?record_id=10922#toc;