1. UNICEF [available at: http://www.unicef.org/infobycountry/Turkey_statistics.html].
2. Turkish Statistical Institute. Turkey in statistics 2009 [available at: http://www.turkstat.gov.tr].
3. World Bank Data and statistics for Turkey [available at: http://www.worldbank.org.tr].
4. OECD. Environmental performance reviews: Turkey 1999 [available at: http://www.oecd-ilibrary.org/content/book/9789264173804-en].
5. Estimation of health and economic benefits of air pollution abatement for Turkey in 1990 and 1993;Zaim;Energy Policy,1997