1. Antarctic Ozone Bulletin. 2002. http://www.wmo.ch/pages/prog/arep/gawozobull02_en.html Accessed on 28 November 2007.
2. Antarctic Ozone Bulletin. 2003. http://www.wmo.ch/pages/prog/arep/gawozobull03_en.html Accessed on 28 November 2007.
3. The Canadian operational procedure for forecasting total ozone and UV radiation;Burrows;Meteorological Applications,1994
4. CIE. 1987. A reference action spectrum for ultraviolet induced erythema in human skin. In Commission Internationale de l' É clairage, CIE Publication No. 17.4, Vienna; 17-22.