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\bibitem{Godoi_etal2013} {\textquotedblleft}\textit{Risk assessment and spatial chemical variability of PM collected at selected bus stations}{\textquotedblright}. Godoi RHM, Godoi AFL, de Quadros LC, Polezer G, Silva TOB, Yamamoto CI, Van Grieken R, Potgieter-Vermaak S, Air quality, atmosphere \& health , 1 (2013).   http://doi.org/10.1007/S11869-013-0210-2

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