Harris Papadakis Mema Roussopoulos Paraskevi Fragopoulou Evangelos P. Markatos Imbuing Unstructured P2P Systems with Non-Intrusive Topology Awareness. 51-60 2009 Peer-to-Peer Computing http://dx.doi.org/10.1109/P2P.2009.5284549 conf/p2p/2009 db/conf/p2p/p2p2009.html#PapadakisRFM09