2DIAZ R V,DOMINGUEZ E R. Health risk by inhalation of PMz5 in the metropolitan zone of the City of Mexico [ J ]. Ecotoxicology and Environ- mental Safety,2009,72(3) :866 -871.
3MATE T, GUAITA R, PICHIULE M, et al. Short -term effect of fine particulate matter (PMzs) on daily mortality due to diseases of the circu- latory system in Madrid (spain)[J]. Science of the Total Environment, 2010,408 ( 23 ) :5750 - 5757.