1. Anual Report 2012,2012
2. An Approach to Determine the Weibull Parameters for Wind Energy Analysis: The Case of Galicia (Spain);Carrillo;Energies,2014
3. TransmissionCode 2007. Network and System Rules of the German Transmission System Operatorshttps://www.vde.com/de/fnn/dokumente/documents/transmissioncode%202007_engl.pdf
4. Energinet Regulation TF 3.2.5 Wind Turbines Connected to Grids with Voltages above 100kV. Eltra and Elkraft Systemhttp://www.energinet.dk/SiteCollectionDocuments/Engelske%20dokumenter/El/Grid%20Code%203.2.5%20Wind%20Turbines%20connected%20above%20100%20kV.pdf
5. The grid code, issue 5, Revision 11http://www2.nationalgrid.com/UK/Industry-information/Electricity-codes/Grid-code/The-Grid-code/