Christopher B. Jones Alia I. Abdelmoty Gaihua Fu Maintaining Ontologies for Geographical Information Retrieval on the Web. 934-951 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2888&spage=934 2003 conf/coopis/2003 CoopIS/DOA/ODBASE db/conf/coopis/coopis2003.html#JonesAF03