1. Baer, S.C., 1985. Thermal control system for solar collector. US Patent No. 4,528,976, US Patent and Trademark Office, Washington, DC.
2. Absorption and scattering of light by small particles;Bohren,1998
3. Buckley, B.S., Guldman, T.A.R., 1983. Method and apparatus for overtemperature control of solar water heating system. US Patent No. 4,399,807. US Patent and Trademark Office, Washington, DC.
4. Burch, J., Merrigan, T., Jorgensen, G., Christensen, C., Hewett, R., 2006. Low-cost residential solar thermal systems. DOE Solar energy technologies program peer review meeting, April 17–19, 2007, Denver, CO, USA.
5. European Commission, 2011. Energy Markets in the European Union in 2011. Retrieved 8/8/2013, from .