1. Arizona Solar Center. Solar architecture, solar heating and cooling manual. 〈http://www.azsolarcenter.com/design/pas-3.html〉.
2. Passive Solar Research Group. University of Nebraska, Lincoln, Omaha. Research page on the web. 〈http://www.ceen.unomaha.edu/solar/solar_fi.php〉.
3. Chen B, Maloney J, Clark D, Mei WN, Kashe N. Measurement of night sky emissivity in determining radiant cooling from cool storage roofs and roof ponds. Passive Solar Research Group, University of Nebraska, Nebraska.
4. Thermal evaluation of a house using a moveable-insulation and cooling system;Niles;Solar Energy,1976
5. BBC Weather website. 〈http://www.bbc.co.uk/weather/world/city_guides〉.