1. Leaders’ Statement: The Pittsburgh Summit (G20, 2009); https://www.g20.org/Content/DE/StatischeSeiten/Breg/G7G20/Anlagen/G20-erklaerungpittsburgh-2009-en.pdf?blob=publicationFile
2. United States Self-Review of Fossil Fuel Subsidies (US Government, 2015); http://www.oecd.org/site/tadffss/publication
3. G7 Ise-Shima Leaders’ Declaration (G7, 2016); http://www.mofa.go.jp/files/000160266.pdf
4. Inventory of Estimated Budgetary Support and Tax Expenditures for Fossil Fuels 2013 (Organisation for Economic Co-operation and Development, 2013).
5. World Trade Report: Exploring the links between subsidies, trade and the WTO (World Trade Organization, 2006).