1. Energy: the solar hydrogen alternative Sydney;Bockris,1975
2. The hydrogen energy system;Veziroglu,1974
3. The limits to growth: a report for the club of Rome’s project on the predicament of mankind;Meadows,1972
4. Energy storage research and development, annual progress report FY2009;DoE,2010
5. Fuel cell explained;Larminie,2003