1. Lawrence, S., Giles, CL.: Accessibility of information on the web. Nature 400 (1999)
2. Cho, J., Garcia-Molina, H.: The evolution of the web and implications for an incremental crawler. In: The VLDB Journal. (2000) 200–209
3. Lim, L., Wang, M., Padmanabhan, S., Vitter, J.S., Agarwal, R.C.: Characterizing web document change. In: Web-Age Information Management. (2001) 133–144
4. Menaud, J.M.: Cooperative Caches System for Large Scale Distributed Information System. PhD thesis, IRISA/INRIA Rennes France (2000)
5. P. Danzig, R.S.H., Schwartz, M.F.: A case for caching file object inside internetworks. In: Proceedings of ACM Sigcomm’93. (1993) 239–248