Kwangwook Shin Seunghak Lee Geunhwi Lim Hyunsoo Yoon Joong Soo Ma Grapes: Topology-Based Hierarchical Virtual Network for Peer-to-Peer Lookup Services. 159-166 2002 conf/icppw/2002 ICPP Workshops http://csdl.computer.org/comp/proceedings/icppw/2002/1680/00/16800159abs.htm db/conf/icppw/icppw2002.html#ShinLLYM02