1. Review of Vehicular Emissions Trends
2. Gasoline Particle Filter Development
3. International Organization for Standardization (ISO), “Hydrogen fuel quality — product specification (ISO 14687:2019)", ISO, 2019. Retrieved from https://www.iso.org/standard/69539.html.
4. SAE International, "Hydrogen fuel quality for fuel cell vehicles (J2719_202003)", SAE International, 2020. Retrieved from https://www.sae.org/standards/content/j2719_202003/.
5. European Standard, "Hydrogen fuel - product specification and quality assurance - proton exchange membrane (PEM) fuel cell applications for road vehicles (CSN EN 17124)", European Standards, 2018. Retrieved from https://www.en-standard.eu/csn-en-17124-hydrogen-fuel-product-specification-and-quality-assurance-proton-exchange-membrane-pem-fuel-cell-applications-for-road-vehicles/.