user- CHI '02: CHI '02 extended abstracts on Human factors in computing systems, page 628--639. New York, NY, USA, ACM, (2002)
- Commun. ACM 49(4):41--46 (2006)
- SOSP '05: Proceedings of the twentieth ACM symposium on Operating systems principles, page 1--2. New York, NY, USA, ACM, (2005)
- WWW '03: Proceedings of the 12th international conference on World Wide Web, page 366--375. New York, NY, USA, ACM, (2003)
- Queue 4(4):30--36 (2006)
- WWW '07: Proceedings of the 16th international conference on World Wide Web, page 491--500. New York, NY, USA, ACM, (2007)
- IBM Syst. J. 43(3):476--489 (2004)
- IBM Syst. J. 43(3):490--515 (2004)
- IBM Syst. J. 43(3):455--475 (2004)
- IBM Syst. J. 43(3):451--454 (2004)
- SIGIR '07: Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval, page 759--760. New York, NY, USA, ACM, (2007)
- SIGIR '07: Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval, page 916--916. New York, NY, USA, ACM, (2007)
- SIGIR Forum 41(2):42--45 (2007)
- CIKM '05: Proceedings of the 14th ACM international conference on Information and knowledge management, page 460--468. New York, NY, USA, ACM, (2005)
- CIKM '06: Proceedings of the 15th ACM international conference on Information and knowledge management, page 493--502. New York, NY, USA, ACM, (2006)
- SIGIR '06: Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval, page 43--50. New York, NY, USA, ACM, (2006)
- Queue 2(2):36--46 (2004)
- Proceedings of the Australasian Database Conference, (2004)
- WWW '06: Proceedings of the 15th international conference on World Wide Web, page 811--817. New York, NY, USA, ACM Press, (2006)
- ICWS, page 18-25. IEEE Computer Society, (2007)
