Thomas Mandl Christa Womser-Hacker Fusion Approaches for Mappings between Heterogeneous Ontologies. 83-94 2001 conf/ercimdl/2001 ECDL http://link.springer.de/link/service/series/0558/bibs/2163/21630083.htm db/conf/ercimdl/ecdl2001.html#MandlW01