1. European Union: Renewable Energy in the EU - Share of Renewables in Energy Consumption in the EU Reached 17% in 2016 - Eleven Member States Already Achieved Their 2020 Targets, Asia News Monitor,2018
2. European Energy Storage Technology Development Roadmap Towards 2030,2013
3. Hydrogen Roadmap Europe, Fuel Cells and Hydrogen 2 Joint, Undertaking,2019
4. International Renewable Energy Agency, Hydrogen from Renewable Power: Technology Outlook for the Energy Transition,2018
5. Linde Pioneers Hydrogen Compression Techniques for Fuel Cell Electric Vehicles;Metz,2014