Intergovernmental Panel on Climate Change (2012): IPCC Expert Meeting on Geoengineering. Meeting Report. Lima, Peru, 20-22.06.2011. Potsdam. Online verfügbar unter http://www.ipcc.ch/pdf/supporting-material/EM_GeoE_Meeting_Report_final.pdf. Intergovernmental Panel on Climate Change (2012): IPCC Expert Meeting on Geoengineering. Meeting Report. Lima, Peru, 20-22.06.2011. Potsdam. Report of the first expert meeting of IPCC on CE. Link (direct download) Link (download page)