1. Hydration injury to the skin;Kligman,1996
2. Cosmeceuticals as a third category;Kligman;Cosmetics and Toiletries,1998
3. Efficacy claims of cosmetics in Europe must be scientifically substantiated from 1997 on;Rogiers;Skin Res Technol,1997
4. Skin: Interface of a Living System: Perspectives for Skin Care in the Future;Tagami,1998