1. DOE/EIA-0383 (90);U.S. Department of Energy,1990
2. T. Hoff, “The Value of Photovoltaics: A Utility Perspective”, 19th IEEE PV Specialists Conference, New Orleans, LA, May 1987.
3. W.T. Callaghan, “Expanding Photovoltaic Energy Usage: Some Strategic and Technical Considerations”, Int. J. Solar Energy, Vol. 6, 1988.
4. DOE/JPL-1012–114;R Aster,1985
5. EPRI AP-3176-SR;R Taylor,1983