B. Krause, R. Jäschke, A. Hotho, und G. Stumme. HT '08: Proceedings of the nineteenth ACM conference on Hypertext and hypermedia, Seite 157--166. New York, NY, USA, ACM, (2008)
M. Carman, M. Baillie, R. Gwadera, und F. Crestani. SIGIR '09: Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval, Seite 123--130. New York, NY, USA, ACM, (2009)
H. Gao, J. Hu, C. Wilson, Z. Li, Y. Chen, und B. Zhao. Proceedings of the 10th annual conference on Internet measurement, Seite 35--47. New York, NY, USA, ACM, (2010)