1. Photovoltaics: Solar Electricity and Solar Cells in Theory and Practice, www.solarserver.de/wissen/photovoltaic-e.html.
2. Semiconductors for Solar Cells;Moller,1993
3. Berkeley Lab, http://www.lbl.gov/msd/pis/walukiewicz/02$\delimiter”026E30F$02_08_full_solar_spectrum.html.
4. PV panel model based on datasheet values;Sera,2007