Jeffrey Xu Yu Xuemin Lin Hongjun Lu Yanchun Zhang Advanced Web Technologies and Applications, 6th Asia-Pacific Web Conference, APWeb 2004, Hangzhou, China, April 14-17, 2004, Proceedings APWeb Lecture Notes in Computer Science 3007 Springer 2004 3-540-21371-6 db/conf/apweb/apweb2004.html