1. California Air Resources Board Zero Emission Vehicle (ZEV) Program. https://www.arb.ca.gov/msprog/zevprog/zevprog.htm.
2. California's Hydrogen Station Initiatives. https://www.arb.ca.gov/msprog/zevprog/zevprog.htm.
3. Alternative fuel and vehicle technologies Act of 2013 (AB8).
4. Clean Energy and Pollution Reduction Act of 2015 (SB350).
5. Low Carbon Fuel Standard. https://www.arb.ca.gov/fuels/lcfs/fuelpathways/pathwaytable.htm.