1. European Commission, “Commission Proposes New Euro 7 Standards to Reduce Pollutant Emissions from Vehicles and Improve Air Quality,” https://ec.europa.eu/commission/presscorner/detail/en/ip_22_6495, 2023.
2. International Energy Agency, Global Hydrogen Review 2022, OECD Publishing, 2022.
3. Hydrogen economy for sustainable development in GCC countries: A SWOT analysis considering current situation, challenges, and prospects
4. Korea Energy Economics Institute, Global Hydrogen Supply and Demand Status and Future Changes in Hydrogen Supply Potential, Response, https://www.keei.re.kr/main.nsf/index.html?open&p=%2Fweb_keei%2Fpendingissue.nsf%2F0%2F7E7094AFC2A0AD2749258725002643CA&s=%3FOpenDocument%26is_popup%3D1, 2023.
5. A review of ammonia as a compression ignition engine fuel