Renato Lo Cigno Tommaso Pecorella Matteo Sereno Luca Veltri Peer-to-Peer beyond file sharing: Where are P2P systems going? 1-8 2009 IPDPS http://dx.doi.org/10.1109/IPDPS.2009.5160958 conf/ipps/2009 db/conf/ipps/ipdps2009.html#CignoPSV09