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2. Platzer W J and Robinson P D, Education of Architects on Solar and Environment (EASE), Contract No XVII/4. 1030/A/94-165, European Union ALTENER Programme.
3. Solar Optical Properties of Monolithic Aerogel Materials;Roos;SPIE,1994
4. Manufacture and cost of vacuum glazing;Garrison;Solar Energy,1995
5. International Organisation for Standards;ISO,1987