1. Channell J et al (2013) Energy Darwinism: the evolution of the energy industry. Citi GPS: global perspectives & solutions. Citigroup
2. Rfassbind (2009) Global energy potential. SVG
3. Ackermann T, Andersson G, Söder L (2001) Distributed generation: a definition1. Electr Pow Syst Res 57(3):195–204
4. Smil V (2005) Energy at the crossroads: global perspectives and uncertainties. MIT Press, Cambridge
5. US-Energy-Information-Administration (2013) International energy outlook 2013-world total energy consumption by region and fuel, reference case. International Energy Outlook Energy Information Administration, Washington, DC 20585