Grigory Begelman, Philipp Keller, Frank Smadja; Technion Israel Institute of Technology, Citrin Informatik GmbH and RawSugar at Collaborative Tagging Workshop WWW 2006
Jenneke Fokker, Johan Pouwelse and Wray Buntine; Departments of Industrial Design and Computer Sciences Delft University of Technology The Netherlands and Department of Computer Science, Helsinki Institute of Information Technology at Collaborative Taggi
official website of the TAGora project, a STREP project funded by the European Commission in the framework of the FET proactive initiative “Simulating Emergent Properties in Complex Systems”
M. Nentwich. ita-Manuskript, ita-09-02. Institut für Technikfolgen-Abschätzung an der Österreichischen Akademie der Wissenschaften, Wien, (November 2009)