1. U.S. Department of Health & Human Services. Ultraviolet Radiation - Radiation Studies. Centers for Disease Control and Prevention.: CDC. 2016. https://www.cdc.gov/nceh/radiation/ultraviolet.htm. Accessed 23 Aug, 2021.
2. Belkin, P. M.; Césarini Fondation Rothschild, J.; Professor Diffey, F. B.; Hietanen, M.; Roy, C.; Urbach, P. F.; West, S.; Wester, U. Protection Against Exposure to Ultraviolet Radiation. World Health Organisation. 1994. https://www.who.int/uv/publications/proUVrad.pdf.
3. US EPA. Ultraviolet (UV) Radiation and Sun Exposure | US EPA. United States Environmental Protection Agency; 2021. https://www.epa.gov/radtown/ultraviolet-uv-radiation-and-sun-exposure. Accessed 23 Aug, 2021.
4. Sottery, J. How Does Sunscreen Protect Skin? - Scientific American. Scientific American. USA May 7, 2007. https://www.scientificamerican.com/article/how-does-sunscreen-protec/. Accessed 30 Aug, 2021
5. Singh, P. V. Ultraviolet radiation. World Health Organisation. https://www.who.int/health-topics/ultraviolet-radiation#tab=tab_1. Accessed 07 Sep, 2021