1. District heating and cooling, country by country–2013 survey;Euroheat & Power,2013
2. District heating and cooling;Frederiksen,2013
3. District energy trends, issues, and opportunities;Gochenour,2001
4. Handbuch der Fernwärmepraxis;Hakansson,1986
5. District heating handbook;International District Heating Association (currently the International District Energy Association),1983