1. Renewable energy projections as published in the national energy action plans of the European member states;Beurskens,2011
2. Energy Strategy 2050 − from coil, oil and gas to green energy. The Danish Government. February 2011 http://www.kebmin.dk/sites/kebmin.dk/files/news/from-coaloil-and-gas-to-green-energy/Energy%20Strategy%202050%20web.pdf (Accessed 17 October 2017).
3. Smart Energy Systems for coherent 100% renewable energy and transport solutions;Mathiesen;Appl. Energy,2015
4. Europe's Buildings under the Microscope;Exec. Summ. 2011 (Accessed 17 October 2017),2011
5. Wind power integration using individual heat pumps – Analysis of different heat storage options;Hedegaard;Energy,2012