1. Greenhouse Gas Emissionshttp://www.imo.org/en/OurWork/Environment/PollutionPrevention/AirPollution/Pages/GHG-Emissions.aspx
2. Decarbonising Maritime Transport Pathways to Zero-Carbon Shipping by 2035,2018
3. Sailing on Solar—Could Green Ammonia Decarbonise International Shipping;Ash,2019
4. Fuels Without Carbon - Prospects and the Pathway Forward for Zero-Carbon Hydrogen and Ammonia Fuels;Lewis,2018
5. The Future of Hydrogen—Seizing Today’s Opportunities,2019