Christoph Böhm Philip Groth Ulf Leser Graph-Based Ontology Construction from Heterogenous Evidences. 81-96 2009 International Semantic Web Conference http://dx.doi.org/10.1007/978-3-642-04930-9_6 conf/semweb/2009 db/conf/semweb/iswc2009.html#BohmGL09