Robbert van Renesse Adrian Bozdog Willow: DHT, Aggregation, and Publish/Subscribe in One Protocol. 173-183 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3279&spage=173 2004 conf/iptps/2004 IPTPS db/conf/iptps/iptps2004.html#RenesseB04