Jian Xu Ee-Peng Lim Wee Keong Ng Cluster-Based Database Selection Techniques for Routing Bibliographic Queries. 100-109 http://link.springer.de/link/service/series/0558/bibs/1677/16770100.htm 1999 conf/dexa/1999 DEXA db/conf/dexa/dexa99.html#XuLN99