NASA - National Aeronautics and Space Administration

Chatfield, R., X. Ren, W. H. Brune, J. Schwab, et al. (2010), Controls on urban ozone production rate as indicated by formaldehyde oxidation rate and nitric oxide, Atmos. Environ., 44, 5395-5406, doi:10.1016/j.atmosenv.2010.08.056.