Steffen Mencke Cornelius Wille Reiner R. Dumke Measuring Distances for Ontology-Based Systems. 97-106 2008 IWSM/Metrikon/Mensura http://dx.doi.org/10.1007/978-3-540-89403-2_9 conf/iwsm/2008 db/conf/iwsm/iwsm2008.html#MenckeWD08