Ambient Gas Concentrations and Personal Particulate Matter Exposures: Implications for Studying the Health Effects of Particles
Sarnat JA, Brown KW, Schwartz J, Coull BA, Koutrakis P. 2005. Ambient Gas Concentrations and Personal Particulate Matter Exposures: Implications for Studying the Health Effects of Particles. Epidemiology, 16(3):385-395.