Terje Brasethvik Jon Atle Gulla A Conceptual Modeling Approach to Semantic Document Retrieval. 167-182 2002 conf/caise/2002 CAiSE http://link.springer.de/link/service/series/0558/bibs/2348/23480167.htm db/conf/caise/caise2002.html#BrasethvikG02