I. Konstas, V. Stathopoulos, and J. Jose. Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval, page 195--202. New York, NY, USA, ACM, (2009)
P. Victor, C. Cornelis, A. Teredesai, and M. De Cock. SAC '08: Proceedings of the 2008 ACM symposium on Applied computing, page 2014--2018. New York, NY, USA, ACM, (2008)
I. Konstas, V. Stathopoulos, and J. Jose. Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval, page 195--202. New York, NY, USA, ACM, (2009)
V. Eguluz, M. Zimmermann, C. Cela-Conde, and M. Miguel. (2006)cite arxiv:physics/0602053
Comment: (15 pages, 7 figures; for related material visit
http://www.imedea.uib.es/physdept).
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)