Two useful links

These two links are some paper about P2P and relative fields.
It is useful for p2p research and development.

Flud is a p2p based backup system. In its wiki, many knowledge about file backup is introduced.

http://www.flud.org/wiki/index.php/RelatedPapers

The Ph.d student collect many paper about his research. It is really a nice job.
http://www.laas.fr/~lcourtes/ludo-1.html