1. European Union (1996) Directive 96/92/EC of the European Parliament and of the Council of 19 December 1996 concerning common rules for the internal market in electricity. Official Journal of the European Union, L 027
2. International Energy Agency (2008) World energy outlook 2008. Technical report, OECD/IEA
3. MacKay DJ (2009) Sustainable Energy – without the hot air. UIT Cambridge Ltd, Cambridge
4. Kempton W, Tomić J (2005) Vehicle-to-grid power implementation: from stabilizing the grid to supporting large scale renewable energy. J Power Sources 144(1):280–294
5. United States (2007) Energy independence and security act of 2007. U.S. G.P.O., Washington DC, pp 110–140