S. Pohl, F. Radlinski, and T. Joachims. JCDL '07: Proceedings of the 7th ACM/IEEE joint conference on Digital libraries, page 417--418. New York, NY, USA, ACM, (2007)
R. Dachselt, M. Frisch, and M. Weiland. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 1353--1356. New York, NY, USA, ACM, (2008)
C. Dugan, M. Muller, D. Millen, W. Geyer, B. Brownholtz, and M. Moore. GROUP '07: Proceedings of the 2007 international ACM conference on Conference on supporting group work, page 387--390. New York, NY, USA, ACM, (2007)
F. Abel, N. Henze, and D. Krause. WWW '08: Proceeding of the 17th international conference on World Wide Web, page 1147--1148. New York, NY, USA, ACM, (2008)
P. Victor, C. Cornelis, A. Teredesai, and M. Cock. SAC '08: Proceedings of the 2008 ACM symposium on Applied computing, page 2014--2018. New York, NY, USA, ACM, (2008)
D. Ramage, P. Heymann, C. Manning, and H. Molina. WSDM '09: Proceedings of the Second ACM International Conference on Web Search and Data Mining, page 54--63. New York, NY, USA, ACM, (2009)
R. White, I. Ruthven, and J. Jose. SIGIR '05: Proceedings of the 28th annual international ACM SIGIR conference on Research and development in information retrieval, page 35--42. New York, NY, USA, ACM Press, (2005)
G. Groh, and C. Ehmig. GROUP '07: Proceedings of the 2007 international ACM conference on Supporting group work, page 127--136. New York, NY, USA, ACM, (2007)
D. Crandall, D. Cosley, D. Huttenlocher, J. Kleinberg, and S. Suri. KDD '08: Proceeding of the 14th ACM SIGKDD international conference on Knowledge discovery and data mining, page 160--168. New York, NY, USA, ACM, (2008)