Physical–chemical characterisation of the particulate matter inside two road tunnels in the São Paulo Metropolitan Area - Brito, J; Rizzo, Luciana Varanda; Herckes, P; Vasconcellos, Pérola de Castro; Caumo, S. E. S; Fornaro, Adalgiza; Ynoue, Rita Yuri; Artaxo Netto, Paulo Eduardo; Andrade, Maria de Fátima (Atmospheric Chemistry and Physics, 2013)