Doina Caragea Jyotishman Pathak Vasant Honavar Learning Classifiers from Semantically Heterogeneous Data. 963-980 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3291&spage=963 2004 conf/coopis/2004-2 CoopIS/DOA/ODBASE (2) db/conf/coopis/coopis2004-2.html#CarageaPH04