1. European Commission Enterprise and Industry Cosmetics Commission recommendation of 22 September 2006 on the efficacy of sunscreen products and the claims made relating thereof, 2006/647/EC Official Journal of the European Union 2007 L265 39 43
2. ISO 24444: 2010 Cosmetics -Sun protection test methods- In vivo determination of the sun protection factor (SPF)
3. ISO 24443:2012 Cosmetics -Sun protection test methods-Determination of sunscreen UVA photoprotection in vitro
4. Effects of UV photographs, photoaging information, and use of sunless tanning lotion on sun protection behaviors;Mahler;Arch Dermatol,2005