1. The European heat market: final report;Ecoheatcool and Euroheat & Power,2006
2. Eurostat. Simplified energy balances – annual data. Luxembourg: Eurostat. Available from: 〈http://ec.europa.eu/eurostat/en/web/products-datasets/-/NRG_100A〉 [accessed 03.10.15].
3. A study of the feasibility of utilizing waste heat from central electric power generating stations and potential applications;The Connecticut Academy of Science and Engineering,2009
4. IEA. World balance. Paris: IEA. Available from: 〈http://www.iea.org/sankey/〉 [accessed 29.09.15].
5. European Environment Agency. Progress on energy efficiency in Europe; 2015. Available from: 〈http://www.eea.europa.eu/data-and-maps/indicators/progress-on-energy-efficiency-in-europe-2/assessment〉 [accessed 07.10.15].