1. Directive 2008/50/EC of the European Parliament and of the Council of 21 May 2008 on ambient air quality and cleaner air for Europe.
2. Gorka P. The study of air pollution, part. I. Gaseous pollutants. Gliwice: Wydawnictwo Politechniki Slaskiej; 2000 (in Polish).
3. Fundamentals of atmosphere protection;Juraszka,2011
4. Ming-Ho Y. Environmental toxicology: Biological and health effects of pollutants, CRC Press; 2005.
5. Act of 27 April 2001 Environmental Protection Act (Journal of Acts of 2001 No 62 item 627 with further amendments) (in Polish).