Evolution of Vehicle Emission Factors in a Megacity Affected by Extensive Biofuel Use: Results of Tunnel Measurements in São Paulo, Brazil

Nogueira, T., Kamigauti, L. Y., Pereira, G. M., Gavidia-Calderón, M. E., Ibarra-Espinosa, S., Oliveira, G. L. D., ... & Andrade, M. D. F.