Luca Pireddu Mario A. Nascimento Taxonomy-Based Routing Indices for Peer-to-Peer Networks. 2004 conf/sigir/2004p2p Workshop on Peer-to-Peer Information Retrieval http://p2pir.is.informatik.uni-duisburg.de/15.pdf db/conf/sigir/p2pir2004.html#PiredduN04