1. European Commission: Fluorinated greenhouse gases. Available:https://ec.europa.eu/clima/policies/f-gas_en[31 July 2019].
2. United States Environmental Protection Agency: Overview of Greenhouse Gases. Available:https://www.epa.gov/ghgemissions/overview-greenhouse-gases[31 July 2019].
3. European Environment Agency. National emissions reported to the UNFCCC and to the EU Greenhouse Gas Monitoring Mechanism. Data Greenh Gas Emiss Removals Sent by Ctries to UNFCCC EU Greenh Gas Monit Mech (EU Memb States)2018.
4. European Union. Regulation (EU) No 517/2014 of the European Parliament and of the Council of 16 April 2014 on fluorinated greenhouse gases and repealing Regulation (EC) No 842/20062014.
5. European Environment Agency: EEA greenhouse gas ‐ data viewer. Available:https://www.eea.europa.eu/data-and-maps/data/data-viewers/greenhouse-gases-viewer[31 July 2019].