1. California Fuel Cell Partnership, “By the Numbers.” https://cafcp.org/by_the_numbers (accessed September 11, 2019).
2. U.S. Department of Energy, “Compare Fuel Cell Vehicles.” https://www.fueleconomy.gov/feg/fcv_sbs.shtml (accessed March 13, 2019).
3. Alternative fuels data center,2017
4. Hydrogen fuel cell electric vehicle performance and user-response assessment: results of an extended driver study;Lipman;Int J Hydrogen Energy,2018
5. 2016 retail fuels report,2016