1. Annual Report for Quarters, July–December (QC), 2003. Irvine, CA: Quantum Corporation. Available from: http://www.qtww.com/home.shtml.
2. Modeling and Evaluating Synergies between Electric Generation and Hydrogen Transportation Fuel in a Renewable System;Barry,2000
3. Implications and Policy Options of California's Reliance on Natural Gas;Bernstein,2002
4. Bringing Fuel Cell Vehicles to Market: Scenarios and Challenges with Fuel Alternatives;Bevilocqua,2001
5. California Energy Commission, June 2001. Investing in California. Sacramento, CA.