1. 2003 Status report shows U.S. air cleanest ever since 1970;Bergman,2004
2. Titanium dioxide photocatalysis;Fujishima;J Photochem Photobiol C: Photochem Rev,2000
3. Althaus HJ, Chudacoff M, Hischier R, Jungbluth N, Osses M, Primas A. Life cycle Inventories of chemicals. Final report ecoinvent data. vol. 2.0(8). Dübendorf: Swiss Centre for Life Cycle inventories; 2007.
4. Performance of ultraviolet photocatalytic oxidation for indoor air cleaning applications;Hodgson;Indoor Air,2007
5. Evaluation of the environmental impacts of ultrafine/nano photocatalyst coatings for pavements using life-cycle assessment. Paper no. 09-1057;Hassan,2009