1. Turkey’s energy yearbook. İstanbul: Uzman Publishing Inc.; 2001.
2. Utilization of natural gas in heating of buildings: saving possibilities and new alternatives (in Turkish);Kılkış,1991
3. Akdeniz AH. Economic analysis of alternative solutions in optimum selection of heating systems for buildings. PhD thesis, University of Ege, İzmir, Turkey, 1989. (In Turkish)
4. Typical weather data of main Turkish cities for energy applications;Üner;International Journal of Energy Research,2000
5. Heating and cooling of buildings—design for efficiency;Kreider,1994