1. Aldy, J.E., Orszag, P.R., Stiglitz, J.E., 2001. Climate Change: An Agenda for Global Collective Action. Conference on 'The Timing of Climate Change Policies', Pew Center on Global Climate Change.
2. Is international emissions trading always beneficial?;Babiker;Energy Journal,2004
3. A future for carbon taxes;Baranzini;Ecological Economics,2000
4. Belgium Renewable Energy Factsheet, 2007. Energy EU Europe's Energy Portal [Retrieved September 7, 2010 from 〈http://ec.europa.eu/energy/energy_policy/doc/factsheets/renewables/renewables_be_en.pdf〉].
5. Burtraw, D., Palmer, K., Kahn, D., 2009. A Symmetric Safety Valve. Resources for the Future, [Discussion paper, retrieved October 13, 2009, from 〈http://www.rff.org/News/Features/Pages/A_Symmetric_Safety_Valve.aspx〉].