Offenberg J.H, Lewis C.W, Lewandowski M., Jaoui M., Kleindienst T.E, Edney E.O.  2007.  Contributions of toluene and alpha-pinene to SOA formed in an irradiated toluene/alpha-pinene/NOx/air mixture: Comparison of results using C-14 content and SOA organic tracer methods. Environmental Science & Technology. 41(11):3972-3976.

Lewis C.W, Volkens J., Braddock J.N, Crews W.S, Lonneman W.A, McNichol A.P.  2006.  Absence of 14C in PM2.5 Emissions from Gasohol Combustion in Small Engines. Aerosol Science and Technology. 

Klouda G.A, Lewis C.W, Rasmussen R.A, Rhoderick G.C, Sams R.L, Stevens R.K, Currie L.A, Donahue D.J, Jull A.JT, Seila R.L.  1996.  Radiocarbon measurements of atmospheric volatile organic compounds: Quantifying the biogenic contribution. Environmental Science & Technology. 30(4):1098-1105.