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2. Statistics Sweden. Housing and construction 2006, calculated. Homepage: . 2007-05-16.
3. Fröling M. Environmental limitations for the use of district heating when expanding distribution into areas with low heat density. In: Ninth international symposium on district heating and cooling, August 30–31, 2004. Espoo, Finland.
4. Fröling M, Bengtsson H, Ramnäs O. Environmental performance of district heating in suburban areas compared with heat pump and pellets furnace. In: Tenth international symposium on district heating and cooling, September 3–5, 2006. Hanover, Germany.
5. Perspectives on implementing energy efficiency in existing Swedish detached houses;Joelsson;Energy Policy,2008