Michael Spahn Joachim Kleb Stephan Grimm Stefan Scheidl Supporting business intelligence by providing ontology-based end-user information self-service. 10 2008 OBI http://doi.acm.org/10.1145/1452567.1452577 conf/semweb/2008obi db/conf/semweb/obi2008.html#SpahnKGS08