Yi Ren Chaofeng Sha Weining Qian Aoying Zhou Beng Chin Ooi Kian-Lee Tan Explore the "Small World Phenomena" in Pure P2P Information Sharing Systems. 232-239 2003 conf/ccgrid/2003 CCGRID http://csdl.computer.org/comp/proceedings/ccgrid/2003/1919/00/19190232abs.htm db/conf/ccgrid/ccgrid2003.html#RenSQZOT03