1. International Energy Agency (2011) World energy outlook 2011. International Energy Agency, Paris
2. WHO (2010) Progress on sanitation and drinking water. 2010 Update. World Health Organization and UNICEF, Geneva
3. Schmidt KF (2007) Green nanotechnology: it’s easier than you think. Project on emerging nanotechnologies. Woodrow Wilson Center, Washington, DC
4. NSTC (1999) Nanotechnology research directions: vision for nanotechnology in the next decade. National Science and Technology Council, Committee on Technology, and the Interagency Working Group on Nanoscience, Engineering and Technology. Washington, DC.
http://www.wtec.org/loyola/nano/IWGN.Research.Directions/
. Accessed August 17, 2014
5. ICCR (2010) Report of the ICCR Joint Ad Hoc Working Group on Nanotechnology in cosmetic products: criteria and methods of detection. International Cooperation on Cosmetic Regulation initiative (ICCR-4), Toronto, ON