1. Testing of solar cells by means of spectral analysis;Gummel;Solar Cells,1991
2. Thermal description of photovoltaic modules;Knaupp,1992
3. Ruther R, Livingstone J, Results of seasonal temperatures on light-induced a-Si:H thin film characteristics, ISES Solar World Congress. Budapest, Hungary, 23–27 August, 1993
4. An estimation of total atmospheric pollution in Cairo using solar energy data;Mosalam Shaltout,1994
5. The spectrum of the solar global radiation on horizontal solar cells in polluted and pure air zones of great Cairo;Mosalam Shaltout,1992