1. IPCC , Synthesis Report. Contribution of Working Groups I, II and III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change , ed. Core writing team R. K. Pachauri and A. Reisinger , Geneva , 2007
2. European Parliament and The Council of the European Union, Directive 2009/29/EC of the European Parliament and of the Council of 23 April 2009 amending Directive 2003/87/EC so as to improve and extend the greenhouse gas emission allowance trading scheme of the Community , 2009
3. European Commission, Commission Regulation (EU) No 601/2012 of 21 June 2012 on the monitoring and reporting of greenhouse gas emissions pursuant to Directive 2003/87/EC of the European Parliament and of the Council , 2012
4. Data retrieved from EU Emissions Trading System (ETS) data viewer, http://www.eea.europa.eu/data-and-maps/data/data-viewers/emissions-trading-viewer , European Environment Agency Website, Last accessed 28 August 2013
5. Infrared differential absorption Lidar (DIAL) measurements of hydrocarbon emissions