J.C., Bisaillon; Cummings, J.R.; Culik, J.S.; Lesko, J.D.; Sims, P.E.; Rand, J.A. (2000). Non-traditional light sources for solar cell and module testing. Photovoltaic Specialists Conference, 2000. Conference Record of the Twenty-Eighth IEEE. IEEE. pp. 1498–1501. doi:10.1109/PVSC.2000.916178.
Naylor, Mark; Kevin C. Farmer (1995). "Sun damage and prevention". Electronic Textbook of Dermatology. The Internet Dermatology Society. Archived from the original on 5 July 2008. Retrieved 2008-06-02.
Naylor, Mark; Kevin C. Farmer (1995). "Sun damage and prevention". Electronic Textbook of Dermatology. The Internet Dermatology Society. Archived from the original on 5 July 2008. Retrieved 2008-06-02.