1. Annual Report - Activities and achievement of the authority 2009, Electricity and Cogeneration Regulatory Authority (ECRA), Riyadh, Saudi Arabia, http://www.ecra.gov.sa/reports.aspx (visited the website in Feb 2012).
2. A new approach to analysis and optimization of evaporative cooling system I: Theory;Qun;Energy,2010
3. A new approach to analysis and optimization of evaporative cooling system II: applications;Qun;Energy,2011
4. ASHRAE Handbook: Refrigeration – SI Edition, American Society of Heating, Refrigeration and Air-Conditioning Engineers, Inc., Atlanta, GA 30329, US, 2006.
5. CIBSE Knowledge Series – Sustainable Low Energy Cooling: An Overview, Latimer Trend & Co. Ltd., Plymouth PL6 7PY, UK, 2005, pp. 15–19.