Emission factors of air pollutants from vehicles measured inside road tunnels in São Paulo: case study comparison - Pérez-Martínez, P. J.; Miranda, Regina Maura de; Nogueira, Thiago; Guardani, Maria L; Fornaro, Adalgiza; Ynoue, Rita Yuri; Andrade, Maria Fátima (International Journal of Environmental Science and Technology, 2014)