1. Parameters influencing the efficiency of DC powered PV pumping systems;Alonso-Abella,1995
2. Personal communication on 26 November 1997;Alonso-Abella,1997
3. Concerted Action for the Testing and Cost Reduction of PV Water Pumping Systems, Final Report,1995
4. Personal communication on 16 September 1999;Oldach,1999
5. Technical evaluation of a low-cost, low-power photovoltaic water pumping DC system and comparison assessment with a typical marketed PV pump;Protogeropoulos,1997