1. Terrestrial photovoltaic measurements—II;Curtis,1976
2. Proc. 3rd European Communities Photovoltaic Solar Energy Conf.;Vera,1980
3. Tandem photovoltaic solar cells and increased solar energy conversion efficiency;Loferski,1976
4. The potential for increasing the efficiency of photovoltaic systems by using multiple cell concepts;Alvi,1976
5. R. L. Moon, G. A. Antypas and L. W. James, Research toward a 35% efficient concentrator solar cell using III–V compounds. Progress Report 1, ERDA contract No. E(0 4-3)1 250.