Physical-chemical characterization of the particulate matter inside two road tunnels in the São Paulo metropolitan area - Brito, Joel Ferreira de; Rizzo, Luciana Varanda; Herckes, P; Vasconcellos, Pérola de Castro; Caumo, S E S; Fornaro, A; Ynoue, R Y; Artaxo Netto, Paulo Eduardo; Andrade, Maria de Fátima (Atmospheric Chemistry and Physics, 2013)