1. Andrews, D., Riekkola, A.K., Tzimas, E., Serpa, J., Carlsson, J., Pardo-Garcia, N., Papaioannou, I., 2012. Background Report on EU-27 District Heating and Cooling Potentials, Barriers, Best Practice and Measures of Promotion. Luxembourg. 10.2790/47209
2. Going for the gold: sewage heat recovery system to serve olympic village;Baber;Dist. Energy,2008
3. Welfare dualism in two scandinavian welfare states: public opinion and party politics;Bay;West Eur. Polit.,2013
4. BCS Incorporated, 2008. Waste Heat Recovery: Technology and Opportunities in U.S. Industry. Washington, DC.
5. Alternative Danish energy planning;Blegaa;Energy Policy,1977