1. Photovoltaic Activities in Saudi Arabia: Application and Research;Alamoud,1987
2. Factors Affecting the Performance of Photovoltaic System (PVPS);Zakzouk;Int. J. Solar Energy,1987
3. Measurement of Solar Radiation-1. Radiation Instruments;Garg;Renewable Energy,1993
4. Standards for the Measurement of Solar Irradiance;Miyake;lntl J. Solar Energy,1993
5. Riordan, C., Cannon, T., Myers, D. and Bird, R. “Solar Irradiance Models, Data, and Instrumentation for PV Device Performance Analysis”. Proc. 18th IEEE Photovoltaic Specialist Conference, (Nov. 1985).