1. EU Commission 2006 Thematic strategy for soil protection . Communication from the Commission to the Council, the European Parliament. Accessed 3 May 2012, available at:http://ec.europa.eu/environment/soil/three_en.htm
2. European Environment Agency 2010 Ecological footprint of European countries . Accessed 3 May 2012, available at:http://www.eea.europa.eu/data-and-maps/indicators/ecological-footprint-of-european-countries/ecological-footprint-of-european-countries
3. European Environment Agency 2011 Land use (Norway) . Why should we care about this issue. Accessed 3 May 2012, available at:http://www.eea.europa.eu/soer/countries/no/soertopic_view?topic=land
4. Eurostat 2010 Results on EU land cover and use published for the first time . Newsrelease 145/2010 – 4 October 2010. Accessed 3 May 2012, available at:http://epp.eurostat.ec.europa.eu/cache/ITY_PUBLIC/5-04102010-BP/EN/5-04102010-BP-EN.PDF
5. FAO 2009 Global agriculture towards 2050 . High-level Expert Forum, Rome 12–13 October 2009. Accessed 3 May 2012, available at:http://www.fao.org/fileadmin/templates/wsfs/docs/Issues_papers/HLEF2050_Global_Agriculture.pdf