Vehicle emissions and 'PM IND. 2,5' mass concentrations in six Brazilian cities - Andrade, Maria de Fátima; Miranda, Regina Maura de; Fornaro, Adalgiza; Kerr, Américo Adlai Franco Sansigolo; Oyama, Beatriz; Andre, Paulo Afonso de; Saldiva, Paulo Hilário Nascimento (Air Quality, Atmosphere and Health, 2012)