1. Directive 2009/28/EC of the european parliament and of the council of 23 april 2009;European Parliament;Off J Eur Union,2009
2. Proposal for a directive of the European Parliament and of the council on the promotion of the use of energy from renewable sources (recast);European Commission,2017
3. Energy policies of IEA countries: Spain 2015 review;International Energy Agency IEA,2015
4. Renewable energy progress report;European Commission,2015
5. The benefits of cooperation in a highly renewable European electricity network;Schlachtberger;Energy,2017