1. WHO. Review of evidence on health aspects of air pollution – REVIHAAP project: final technical report. World Health Organization; 2013. http://www.euro.who.int/__data/assets/pdf_file/0004/193108/REVIHAA P-Final-technical-report-final-version.pdf?ua=1.
2. WHO. Health risks of air pollution in Europe – HRAPIE project. Recommendations for concentration–response functions for cost–benefit analysis of particulate matter, ozone and nitrogen dioxide. World Health Organization; 2013. http://www.euro.who.int/__data/assets/pdf_file/0006/238956/Health-risks-of-air-pollution-in-Europe-HRAPIE-project,Recommendations-for-concentrationresponse-functions-for-costbenefit-analysis-of-particulate-matter,ozone-and-nitrogen-dioxide.pdf?ua=1.
3. Health effects of particulate air pollution: A review of epidemiological evidence
4. World Health Organization. The top 10 causes of death. Fact sheet N 310, June 2011.