1. Galaxy zoo: Exploring the motivations of citizen science volunteers;MJ Raddick;Ast Ed Rev,2010
2. A new dawn for citizen science;J Silvertown;Trends Ecol Evol,2009
3. European Union. Geospatial EMergency Management Action. 2012. Available: http://projectsjrceceuropaeu/jpb_public/act/publicexportworkprogrammehtml?actId=453. Accessed 2015 Mar 31.
4. European Union. Demonstrating the concept of 'Citizen Observatories'. 2013. Available: https://eceuropaeu/research/participants/portal/desktop/en/opportunities/h2020/topics/396-sc5-17-2015html. Accessed 2016 Mar 31.
5. Copernicus Masters. ESA’s earth observation director to unveil first GMES master. 2011. Available: http://wwwcopernicus-masterscom/indexphp?anzeige=press-2011-03html. Accessed 2016 Mar 31.