Urban air quality comparison for bus, tram, subway and pedestrian commutes in Barcelona

T. Moreno, C. Reche, I. Rivas, MC. Minguillón, V. Martins, C.Vargas, G. Buonanno, J. Parga, M. Pandolfi, M. Brines, M. Ealo, A. Fonseca, F. Amato, G. Sosa, M. Capdevila, E. de Miguel, X. Querol, W. Gibbons. 2015.
Urban air quality comparison for bus, tram, subway and pedestrian commutes in Barcelona

Environmental Research, Volume 142, October 2015, Pages 495–510, Open access.