<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Wernhard, Christoph</hi> (2014): <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">Expressing view-based query processing and related approaches with second-order operators</hi>", Technical Report - Knowledge Representation and Reasoning 14-02, TU Dresden, <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://www.wv.inf.tu-dresden.de/Publications/2014/report-2014-02.pdf">http://www.wv.inf.tu-dresden.de/Publications/2014/report-2014-02.pdf</ref> [letzter Zugriff 9. Oktober 2015].