1. United Nations Framework Convention on Climate Change (UNFCCC). The Paris Agreement; 2017. [accessed May 17, 2017].
2. European Commission. Energy roadmap 2050; 2012. .
3. International Energy Agency, Renewables 2017; 2017. [accessed November 30, 2017].
4. North European Power Perspectives, Reglering av kraftsystemet med ett stort inslag av variabel produktion [Regulation of the power system with a large amount of variable production]; 2016. .