1. European Parliament and Council of European Union (2018) Directive EU no. 2018/2001. Off J Eur Union 82–209. https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32018L2001&from=EN
2. European Parliament and Council of European Union (2018) Directive EU no. 2018/2002. Off J Eur Union 210–230. https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32018L2002&from=EN
3. Department of the Environment and Energy of Australia. The renewable energy target (RET) scheme. https://www.environment.gov.au/climate-change/government/renewable-energy-target-scheme
4. National Conference of State Legislatures. State renewable portfolio standards and goals. http://www.ncsl.org/research/energy/renewable-portfolio-standards.aspx
5. Olivares DE, Mehrizi-Sani A, Etemadi AH, Cañizares CA, Iravani R, Kazerani M, Hajimiragha AH, Gomis-Bellmunt O, Saeedifard M, Palma-Behnke R, Jimènez-Estèvez GA, Hatziargyriou ND (2014) Trends in microgrid control. IEEE Trans Smart Grid 5(4):1905–1919