1. A knowledge-based approach to the design of integrated renewable energy systems;Ramakumar;IEEE Trans Energy Convers,1992
2. Experience results and techno-economic feasibility of using photovoltaic generators instead of diesel motors for water pumping from rural desert wells in Jordan;Mahmoud;IEE Proc,1990
3. Sewage plant powered by combination of photovoltaic, wind and biogas on the Island of Fehmarn, Germany;Erhard;Renew Energy,1991
4. Source reliability in a combined wind-solar-hydro system;Traca;IEEE Trans Power Appar Syst,1983
5. The essence way renewable energy system;Douglas;Sol Today,1997