D. Shen, Z. Chen, Q. Yang, H. Zeng, B. Zhang, Y. Lu, und W. Ma. Proceedings of the 27th annual international ACM SIGIR conference on Research and development in information retrieval, Seite 242--249. New York, NY, USA, ACM, (2004)
B. Choi, und Z. Yao. Foundations and Advances in Data Mining, Volume 180 von Studies in Fuzziness and Soft Computing, Springer, Berlin / Heidelberg, (2005)
S. Dumais, und H. Chen. Proceedings of the 23rd annual international ACM SIGIR conference on Research and development in information retrieval, Seite 256--263. New York, NY, USA, ACM, (2000)
R. Angelova, und G. Weikum. Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval, Seite 485--492. New York, NY, USA, ACM, (2006)