Dimitris Zeginis Yannis Tzitzikas Vassilis Christophides On the Foundations of Computing Deltas Between RDF Models. 637-651 2007 conf/semweb/2007 ISWC/ASWC http://dx.doi.org/10.1007/978-3-540-76298-0_46 db/conf/semweb/iswc2007.html#ZeginisTC07