user- WWW '06: Proceedings of the 15th international conference on World Wide Web, page 585--594. New York, NY, USA, ACM, (2006)
- Proceedings of the Workshop on Social and Collaborative Construction of Structured Knowledge at the 16th International World Wide Web Conference WWW 07, Banff, Canada, (2007)
- IEEE Intelligent Systems 22(2):94--96 (2007)
- WWW '07: Proceedings of the 16th international conference on World Wide Web, page 825--834. New York, NY, USA, ACM, (2007)
- CHI '04: Proceedings of the SIGCHI conference on Human factors in computing systems, page 575--582. New York, NY, USA, ACM Press, (2004)
- WWW '07: Proceedings of the 16th international conference on World Wide Web, page 261--270. New York, NY, USA, ACM Press, (2007)
- MIT Sloan Management Review 47(3):21-28 (Spring 2006)
- HICSS '07: Proceedings of the 40th Annual Hawaii International Conference on System Sciences, page 80. Washington, DC, USA, IEEE Computer Society, (2007)
- CSCW '06: Proceedings of the 2006 20th anniversary conference on Computer supported cooperative work, page 353--362. New York, NY, USA, ACM Press, (2006)
- Queue 1(9):40--50 (2004)
- Commun. ACM 38(3):69--81 (1995)
- ICSE '07: Proceedings of the 29th International Conference on Software Engineering, page 344--353. Washington, DC, USA, IEEE Computer Society, (2007)
- Communications of the ACM 37(1):93-105 (1994)
- IEEE Computer 27(5):19-26 (May 1994)
- IEEE Computer 32(9):66-71 (1999) .
- Human-Computer Interaction 15(2/3):139--178 (2000)
