1. W. Adkinson, J. Eisenbach, T. Lenard, Privacy online: a report on the information practices and policies of commercial web sites, Technical Report, Progress & Freedom Foundation, 2002.
2. P. Beatty, I. Reay, S. Dick, J. Miller, P3P adoption on e-Commerce web sites: a survey and analysis, IEEE Internet Computing 11 (2) (2007) 65–71, URL: (accessed 16.12.07).
3. S. Beitzel, E. Jensen, D. Lewis, A. Chowdhury, A. Kolcz, O. Frieder, Improving automatic query classification via semi-supervised learning, in: Proceedings of The Fifth IEEE International Conference on Data Mining, New Orleans, Louisiana, USA, 2005.
4. B. Bos, H.W. Lie, C. Lilley, I. Jacobs, Cascading Style Sheets, Level 2, CSS2 Specification, May 1998, URL: (accessed 16.12.07).
5. S. Brin, L. Page, The anatomy of a large-scale hypertextual web search engine, in: Proceedings of the 7th World Wide Web Conference, 1998, URL: (accessed 16.12.07).