1. Impact of temperature and humidity on the perception of indoor air quality;Fang;Indoor Air,1998
2. P. Wargocki, D.P. Wyon, P.O. Fanger, Productivity is affected by the air quality in offices, Proceeding of Healthy Buildings 2000, 1 (2000) 635-640, August 6-10, Helsinki.
3. Emerging HVAC&R issues: energy, environment, and economics;Spauschus;ASHRAE Journal,1990
4. Experimental study of sensible heat recovery of heat pump during heating and ventilation;Nguyena;International Journal of Refrigeration,2005
5. Hydrocarbon balance, Islamic republic of Iran, Ministry of petroleum, Institute for International Energy Studies (IIES), 2006, p. 11, ISBN 978-600-90274-1-5.