1. Thermal energy collector and storage with radiatively heated walls;Rommel,1987
2. Flat-plate solar collector with monolithic silica aerogel;Svendsen,1987
3. Solar collector based on monolithic silica aerogel;Svendsen,1989
4. Investigation of flat plate monolithic silica aerogel collectors;Nordgaard,1991
5. Solare Transmission und Wärmetransport-mechanismen bei transparenten Wärmedämmaterialien;Platzer,1988