Guillermo Nudelman Hess Cirano Iochpe Alfio Ferrara Silvana Castano Towards Effective Geographic Ontology Matching. 51-65 2007 conf/geos/2007 GeoS http://dx.doi.org/10.1007/978-3-540-76876-0_4 db/conf/geos/geos2007.html#HessIFC07