A. Chin, und M. Chignell. HYPERTEXT '06: Proceedings of the seventeenth conference on Hypertext and hypermedia, Seite 11--22. New York, NY, USA, ACM Press, (2006)
S. Chakrabarti, M. Joshi, und V. Tawde. Proceedings of the 24th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, Seite 208-216. ACM Press, (2001)
D. Millard, und M. Ross. HYPERTEXT '06: Proceedings of the seventeenth conference on Hypertext and hypermedia, Seite 27--30. New York, NY, USA, ACM Press, (2006)