3LI S,CHENS,ZHU L,et al.Concentrations and risk as-sessment of selected monoaromatic hydrocarbons in busesand bus stations of Hangzhou,China. Science of TheTotal Environment . 2009
4I ARC.I ARC monographs on the evaluation of carcinogenicrisk to humans. . 1987
5TONKELAAR D W.Exposure of Car Passengers to CO,NO,NO2,Benzene,Toluene and Lead. . 1983
6CHAN L Y,LAU WL,WANG X M,et al.Preli minarymeasurements of aromatic VOCs in public transportationinGuangzhou,China. Environment Internatinal . 2003
7SOM D,DUTTA C,CHATTERJEE A,et al.Studies oncommuters exposure to BTEXin passenger cars in Kolk-ata,India. Science of the Total Environment . 2007
8Marion J F,Brent D K.Measurement of volatile organic compounds inside automobiles. Journal of Exposure Analysis and Environment Epidemiology . 2003
