| http://www.ipcc-nggip.iges.or.jp/public/2006gl/ | 2006 IPCC Guidelines for National Greenhouse Gas Inventories |
| http://www.evo-world.org | International Performance Measurement and Verification Protocol – IPMVP |
| http://ec.europa.eu | EU ETS PHASE III – Emissions from 1 January 2013 |