1. Dow Corning 2007 http://www.dowcorning.com/applications/search/default.aspx?Ne=4294965469&N=4294960276+4294965246&bhcp=1&DCCD=CONTENT&dccCto=Shampoo%20Formulations&DCCT=CONTENT
2. Environment Canada 2010 http://www.ec.gc.ca/lcpe-cepa/default.asp?lang=En&n=5F213FA8-1
3. European Commission 2011 http://ec.europa.eu/environment/chemicals/reach/reach_intro.htm
4. Nike 2010 http://www.nike.com/nikeos/p/gamechangers/en_US/cd_how_it_works
5. Timberland 2011 http://community.timberland.com/Earthkeeping/Green-Index#ChemicalsUsed