Robert Baumgartner Oliver Frölich Georg Gottlob The Lixto Systems Applications in Business Intelligence and Semantic Web. 16-26 2007 conf/esws/2007 ESWC http://dx.doi.org/10.1007/978-3-540-72667-8_3 db/conf/esws/eswc2007.html#BaumgartnerFG07