C. I. Beattie, J. W. S. Longhurst and N. K. Woodfield, “Air Quality Management: Evolution of Policy and Practice in the UK as Example by the Experience of English Local Government,” Atmospheric Environment, Vol. 35, No. 8, 2001, pp. 1479-1490. doi:10.1016/S1352-2310(00)00311-3
 C. A. Pope, M. Thun, M. Namboodiri, D. Dockery, J. Evans, F. Speizer and C. Heath, “Particulate Air Pollution as a Predictor of Mortality in a Prospective Study of US Adults,” American Journal Respiratory Critical Care Medicine, Vol. 151, 1995, pp. 669-674. doi:10.1164/ajrccm/151.3_Pt_1.669
 C. A. III Pope and D. W. Dockery, “Epidemiology of Particle Effects,” In: S. T. Holgate, J. M. Samet, H. S. Koren and R. L. Maynard, Eds., Air Pollution and Health, Academic Press, San Diego, 1999.
 X. Querol, A. Alastuey, C. R. Ruiz, B. Artinano, H. C. Hansson, R. M. Harrison, E. Buringh, H. Mten Brink, M. Lutz, P. Bruckmann, P. Straehl and J. Schneider, “Speciation and Origin of PM10 and PM2.5 in Selected European Cities,” Atmospheric Environment, Vol. 38, 2004, pp. 6547-6555. doi:10.1016/j.atmosenv.2004.08.037