Zhan Cui Ernesto Damiani Marcello Leida Marco Viviani OntoExtractor: A Fuzzy-Based Approach in Clustering Semi-structured Data Sources and Metadata Generation. 112-118 2005 conf/kes/2005-1 KES (1) http://dx.doi.org/10.1007/11552413_17 db/conf/kes/kes2005-1.html#CuiDLV05