The following references would be useful for the studies: District Heating and Cooling, A Country by Country 2005 Survey; projects financed by the EU such as EUROHEATCOOL, and the IEA study Coming in from the Cold, and others.
Pour les études, il sera utile d'examiner le document District Heating and Cooling, A Country by Country 2005 Survey, les projets financés par l'UE tels que le projet EUROHEATCOOL, l'étude de l'AIE Coming in from the Cold, etc.