1. Maynard A. Nanotechnology: a research strategy for addressing risk. Project on emerging nanotechnologies. Woodrow Wilson International Center for Scholars, June 2006. Available from: URL:http://www.nanotechproject.org/file_download/77. Accessed December 1, 2007.
2. Australian Government TGA, OTC Medicines Section. A review of the scientific literature on the safety of nanoparticulate titanium dioxide or zinc oxide in sunscreens. Available from: http://www.tga.gov.au/npmeds/sunscreen-zotd.pdf. Accessed January 16, 2006.
3. 2007 Sunscreens: some are short on protection;Consumer Reports,2007
4. The potential risks of nanomaterials: a review carried out for ECETOC;Borm;Part Fibre Toxicol,2006
5. In situ precipitation: a novel cytochemical technique for visualization of permeability pathways in mammalian stratum corneum;Nemanic;J Histochem Cytochem,1980