1. https://polskialarmsmogowy.pl (data of visit 22 January 2018)
2. Directive 2008/50/EC of the European Parliament and the Council of 21 May 2008 (CAFE).
3. Directive 2009/125/EC of the European Parliament and the Council, (Ecodesign)
4. Act of 5 June 1998 on the government of the voivodship (i.e. Journal of Law of 2016 item 486 as amended)
5. Act of 27 April 2001 - Law on environmental protection (i.e. Journal of Law of 2007, item 519 as amended)