Vehicular particulate matter emissions in road tunnels in São Paulo, Brazil - Sanchez Ccoyllo, Ódon Román; Freitas, Edmílson Dias de; Fornaro, Adalgiza; Ynoue, Rita Yuri; Martins, Leila Droprinchinski; Astolfo, Rosana; Miranda, Regina Maura de; Borges, Alessandro S; Freitas, Helber; Moreira, Andréa; Andrade, Maria F (Environmental Monitoring and Assessment, 2008)