1. District heating in Sweden 1948–1990;Werner;Femwaerme Int.,1991
2. Foreign heating system present situation and the development tendency;Zhang;Ind. Technol. Econ.,2006
3. Reference the Russian experience actively develops our career in central heating;Zou;HVAC,2000
4. Japan central heating (cold) system development present situation;Wei;J. Ji Lin Inst. Civ. Eng. Archit.,2001
5. District energy system analysis (DESA) – a computer aided feasibility tool;Morofsky;ASHRAE Trans.,1982