1. The Optics of Nonimaging Concentrators;Welford,1978
2. Design nonimaging concentrators as second stage in tandem with image-forming first stage concentrators;Winston;Appl. Opt.,1980
3. Optimization of dish solar concentrators with and without secondary concentrators;Jaffe;U.S. Dept. of Energy Technical Report DOE/JPL-1060-57 (DE 83007266),1982
4. Geometrical vector flux and some new nonimaging concentrators;Winston;J. Opt. Soc. Am.,1979
5. Concentration enhancement of a point focus dish using a nonimaging secondary: A full scale optical experiment;Winston,1982