1. Macromedia Flash Player adoption statistics,
http://www.macromedia.com/software/player_census/flashplayer
2. Fast Search & Transfer ASA (FAST) Inc.,
http://www.AlltheWeb.com
3. Google Inc.,
http://www.google.com
4. Kleinberg, J.: Authoritative Sources in a Hyperlinked Environment. In: Proc. 9th ACMSIAM Symposium on Discrete Algorithms, pp. 668–677 (1998)
5. Smeulders, A., et al.: Content-based image retrieval at then end of the early years. IEEE Trans. Pattern Analysis and Machine Intelligence 22(12), 1349–1380 (2000)