1. Teratology Society position paper: recommendations for vitamin A use during pregnancy;Anonymous;Teratology,1987
2. Exposure Factors Handbook;Anonymous,1997
3. Merck Index;Anonymous,2001
4. OECD Guideline for the Testing of Chemicals: Skin Absorption (in vitro method);Anonymous,2004
5. Basic Criteria for the in vitro Assessment of Dermal Absorption of Cosmetic Ingredients, Updated March 2006;Anonymous,2006