Linhao Xu Chenyun Dai Wenyuan Cai Shuigeng Zhou Aoying Zhou Towards Adaptive Probabilistic Search in Unstructured P2P Systems. 258-268 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3007&spage=258 2004 conf/apweb/2004 APWeb db/conf/apweb/apweb2004.html#XuDCZZ04