- Proceedings of the ACM SIGOIS and IEEECS TC-OA 1988 conference on Office information systems, page 30--37. New York, NY, USA, ACM Press, (1988)
- Commun. ACM 48(7):55-59 (2005)
- CHI '04: Proceedings of the SIGCHI conference on Human factors in computing systems, page 343-350. New York, NY, USA, ACM Press, (2004)
- EACE '05: Proceedings of the 2005 annual conference on European association of cognitive ergonomics, page 91-98. University of Athens, (2005)
- CHI '06: CHI '06 extended abstracts on Human factors in computing systems, page 1295-1300. New York, NY, USA, ACM Press, (2006)
- CSCW '98: Proceedings of the 1998 ACM conference on Computer supported cooperative work, page 189-196. New York, NY, USA, ACM Press, (1998)
- CSCW '98: Proceedings of the 1998 ACM conference on Computer supported cooperative work, page 179-188. New York, NY, USA, ACM Press, (1998)
- CSCW '98: Proceedings of the 1998 ACM conference on Computer supported cooperative work, page 59-68. New York, NY, USA, ACM Press, (1998)
- CSCW '02: Proceedings of the 2002 ACM conference on Computer supported cooperative work, page 236-245. New York, NY, USA, ACM Press, (2002)
- CSCW '02: Proceedings of the 2002 ACM conference on Computer supported cooperative work, page 226-235. New York, NY, USA, ACM Press, (2002)
- CSCW '02: Proceedings of the 2002 ACM conference on Computer supported cooperative work, page 136-145. New York, NY, USA, ACM Press, (2002)
- CSCW '02: Proceedings of the 2002 ACM conference on Computer supported cooperative work, page 96-105. New York, NY, USA, ACM Press, (2002)
- CSCW '02: Proceedings of the 2002 ACM conference on Computer supported cooperative work, page 77-86. New York, NY, USA, ACM Press, (2002)
- CSCW '04: Proceedings of the 2004 ACM conference on Computer supported cooperative work, page 578-581. New York, NY, USA, ACM Press, (2004)
- CSCW '04: Proceedings of the 2004 ACM conference on Computer supported cooperative work, page 457-466. New York, NY, USA, ACM Press, (2004)
- CSCW '04: Proceedings of the 2004 ACM conference on Computer supported cooperative work, page 447-456. New York, NY, USA, ACM Press, (2004)
- CSCW '04: Proceedings of the 2004 ACM conference on Computer supported cooperative work, page 437-446. New York, NY, USA, ACM Press, (2004)
- CSCW '04: Proceedings of the 2004 ACM conference on Computer supported cooperative work, page 262-265. New York, NY, USA, ACM Press, (2004)
- CSCW '04: Proceedings of the 2004 ACM conference on Computer supported cooperative work, page 212-221. New York, NY, USA, ACM Press, (2004)
- CSCW '04: Proceedings of the 2004 ACM conference on Computer supported cooperative work, page 112-121. New York, NY, USA, ACM Press, (2004)


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