J. Vig, S. Sen, und J. Riedl. IUI '09: Proceedingsc of the 13th international conference on Intelligent user interfaces, Seite 47--56. New York, NY, USA, ACM, (2008)
P. Heymann, D. Ramage, und H. Garcia-Molina. SIGIR '08: Proceedings of the 31st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, Seite 531--538. New York, NY, USA, ACM, (2008)
Y. Song, Z. Zhuang, H. Li, Q. Zhao, J. Li, W. Lee, und C. Giles. SIGIR '08: Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval, Seite 515--522. New York, NY, USA, ACM, (2008)