Grace SauLan Loo Kok-Huat Lee An Interface to Databases for Flexible Query Answering: A Fuzzy-Set Approach. 654-663 http://link.springer.de/link/service/series/0558/bibs/1873/18730654.htm 2000 conf/dexa/2000 DEXA db/conf/dexa/dexa2000.html#LooL00