1. Concentrated Solar Power Fact Book,2013
2. NREL CSP projects database: http://www.nrel.gov/csp/solarpaces/by_project.cfm.
3. http://www.schott.com/csp/english/download/schott_ptr70_4th_generation_brochure.pdf.
4. http://hubpages.com/technology/Parabolic-trough-systems-and-their-components.
5. Investigation of heat transfer enhancement in a parabolic trough collector with a modified absorber;Kajavali;Int. Energy J.,2014