1. Disruptive Geo 2013 The Disruptive Potential of GIS 2.0 http://www.disruptivegeo.com/2013/03/the-disruptive-potential-of-gis-2-0/
2. Geography in the Workforce: Good News to Share;Dobson;Ubique,2014
3. Citizens as Sensors: The World of Volunteered Geography;Goodchild;GeoJournal,2007
4. Howe , Jeff 2006 Crowdsourcing: A Definition http://crowdsourcing.typepad.com/cs/2006/06/crowdsourcing_a.html
5. Geography's American Constituency: Results from the AGS Geographic Knowledge and Values Survey;Kozak;International Research in Geographical and Environmental Education,2015