1. Optimization of a fixed solar thermal collector;Garrison;Solar Energy,1979
2. The Optics of Nonimaging Concentrators;Welford,1978
3. A survey and evaluation of current design of evacuated collectors;Graham;Final Technical Report for U.S. Dept. of Energy. Contract No. DE-AC04-78CS05350,1979
4. Performance and testing of a stationary concentrating collector;Cole,1977
5. Ideal flux concentrators with reflector gaps;Winston;Appl. Opt.,1978