Karl Aberer Luc Onana Alima Ali Ghodsi Sarunas Girdzijauskas Seif Haridi Manfred Hauswirth The Essence of P2P: A Reference Architecture for Overlay Networks. 11-20 2005 conf/p2p/2005 Peer-to-Peer Computing http://doi.ieeecomputersociety.org/10.1109/P2P.2005.38 db/conf/p2p/p2p2005.html#AbererAGGHH05