1. United States Environmental Protection Agency. National Emissions Inventory (NEI) Air Pollutant Emissions Trend Data, http://www.epa.gov/ttn/chief/trends/index.html#tables. June 2012.
2. Flue gas denitrification – selective catalytic oxidation of NO to NO2;Karlsson;Ind Eng Chem Proc Des Dev,1984
3. Atmospheric Chemistry and Physics of Air Pollution;Seinfeld,1986
4. (1981) Reaction kinetics of nitrogen dioxide with liquid water at low partial pressure;Lee;J Phys Chem,1981
5. Solubility equilibria of the nitrogen oxides and oxyacids in dilute aqueous solutions;Schwartz,1981