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P. Victor, C. Cornelis, A. Teredesai, и M. De Cock. SAC '08: Proceedings of the 2008 ACM symposium on Applied computing, стр. 2014--2018. New York, NY, USA, ACM, (2008)
I. Konstas, V. Stathopoulos, и J. Jose. Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval, стр. 195--202. New York, NY, USA, ACM, (2009)
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http://www.imedea.uib.es/physdept).
P. Victor, C. Cornelis, A. Teredesai, и M. Cock. SAC '08: Proceedings of the 2008 ACM symposium on Applied computing, стр. 2014--2018. New York, NY, USA, ACM, (2008)