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2. Klimatfrågan styr Europas energimarknad, Energi världen, Number 2;Swedish Energy Agency,2009
3. Securing your energy future: commission presents energy security, solidarity and efficiency proposals;European Commission,2011
4. Combined heat and power (CHP) in the EU, Turkey, Norway and Iceland – 2006 data;EUROSTAT,2011
5. The EU climate and energy package;European Commission,2011