1. Proc. 6th E.C. Photovoltaic Solar Energy Conf.;Arvisu,1985
2. Effect of concentration on the performance of flat plate photovoltaic modules
3. Solar Cells and Optics for Photovoltaic Concentration;Luque,1989
4. Proc. 6th E.C. Photovoltaic Solar Energy Conf.;Maycock,1985