1. Abu Dhabi Water and Electricity Company (ADWEC), 2009. .
2. Energy pay-back time and CO2 emissions of PV systems;Alsema;Progress in Photovoltaics: Research and Applications,2000
3. Bankier, C., Gale S., 2006. Energy payback of roof mounted photovoltaic cells energy bulletin. .
4. Blakers, A., Weber, K., 2004. The energy intensity of photovoltaic (PV) systems. .
5. Life-cycle energy analysis of building integrated photovoltaic systems (BiPVs) with heat recovery unit;Crawford;Renewable and Sustainable Energy Reviews,2006